Workplace Deafness: Creating A Safe Working Environment

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Noise induced hearing loss is caused by sounds that are too loud – it can be caused by loud sounds that last only for a brief time (an explosion, for instance) or by continuous exposure to loud sounds (loud workplace, for instance).

What are the signs of hearing loss?

The first signs of noise induced hearing loss workplace hearing loss(NIHL) often go unnoticed. People usually notice it when they are unable to understand what someone is saying to them when they are in a noisy room or on the phone or when they notice that they have to turn up the volume of the TV. Even though a person might not notice that their environment or activities are damaging their hearing, they could end up having issues with hearing in the future. Even though that damage might be only temporary, it could still have a negative effect on hearing many years later.

Although everyone has been exposed to harmful noises at some point in their lives, some people are more vulnerable than others are, especially if they work in an environment that is loud. Luckily, major steps towards a safer work environment have already been taken, with the Control of Noise at Work Regulations from 2005 being one of the latest achievements.

The duties of an employer

According to regulations, the employer is obliged to assess the risk to employees and take action to reduce any noise exposure that can result in occupational deafness. If employees work in an environment that might damage their hearing, the employer has to provide hearing protection, thereby avoiding workplace hearing loss.

Employees should not be kept in the dark either – they should be informed about the risks, and they also play an active role – they have to undergo proper training, and they have to be properly trained on how to avoid the risks.

The noise action levels are levels of noise in decibels that should not be exceeded in a working environment. It is the duty of every employer to make sure that those noise action levels are not exceeded. Lower exposure values are set at 80 decibels with peak pressure at 135 decibels. Upper exposure values are set at 85 decibels with peak sound pressure at 137 decibels. The limit that should not be exceeded is set to 87 decibels with peak pressure at 140 decibels.

Workplace requirements

An employer must make sure that his workplace meets the following prerequisites in order to keep his workers safe:

  • The noise exposure should be between the lower and upper noise action levels
  • The employer must ensure proper usage and maintenance of hearing protectors
  • Employees should receive training, information on how hearing protectors are used and how to properly care about them
  • The employees must be informed about the noise exposure, the risk of that exposure, what is being done to avoid the risk, how to use hearing protection
  • The employees must also be informed about their duties under the regulations of 2005 (learning how to minimise the risk, proper usage and storage of hearing protection and equipment, when to use it).

Once these regulations are in place, the workplace will be a safe environment, no matter how loud it might get.

The Benefits of Wearing Aural Safety Gear

Aural safety gear is a great way to reduce the risk of developing noise-induced hearing loss and occupational hearing loss. The best way to cut back on noise is to fix the source of it, but sometimes that isn’t an option. In these cases, you must do what you can to wear hearing protection in the form of aural safety gear in order to cut back on the amount of noise that the ears have to process. Aural safety gear should be worn if the decibels at your workplace go above 85 decibels to prevent hearing loss.

Types of Protection

Ear Plugs

Ear plugs are placed in the ear to block the ear canal and protect the ear from noise. They can be preformed and premolded or moldable, which are usually made of foam. Ear plugs can be sold in two formats, as reusable plugs or disposable ones. You can also order custom molded ear plugs. You can also get semi-insert ear plugs, with two ear plugs that are held in place over the ear canal ends by a headband that is rigid.

Pros of ear plugs:

  • They can be either one time use or a reusable pair, so you can have them when you need them or just use them one time without worrying about it.
  • More comfortable than defenders to some, depending on the person

Cons of ear plugs:

  • If the ear plugs do not fit, they will not protect like they need to.
  • Have to buy a new pair if you lose them
  • May be uncomfortable for some

Ear Defenders

640px-Chainsaw_helmetEar defenders are also known as ear muffs, and they are made up of soft ear cushions and sound-attenuating material that fits around the head and ear, with hard outer cups and held together by a headband that goes over the top of the head.

Pros of ear defenders:

  • Great noise protection
  • Easy to use

Cons of ear defenders:

  • They may hurt the ears if worn for too long.

Ear defenders are better worn at workplaces and when around high level decibel noise and are well suited to doing yard work around noisy machinery such as a leaf blower. Ear plugs are better for when attending a very loud concert, being at a bar for an extended period of time, or when you are a musician who wants to protect your ears from loud noise.

Why Protect Your Ears?

Protecting your ears is always preferable to exposing them to noise. Noise can consist of high decibels and cause damage that, if is accrued enough or is loud enough at one point in time, can eventually cause hearing loss and deafness. The ears have tiny hairs that translate vibrations into sounds. When a vibration is too intense and the sound is above 85 decibels, it can damage the tiny hairs and the cells will die inside the inner ear. Then the hearing is damaged to a great extent and can’t be restored back to the way it was. Protecting your ears with aural safety gear so that doesn’t happen is the best thing you can do to protect your hearing. Keep your senses intact  and use gear such as ear plugs and ear defenders to protect your ears. They are more sensitive and easily damaged than you may think, so keep them in good shape with the appropriate gear and always use proper protocol to keep your hearing protected.

Biology of the Middle Ear

The middle ear is the part of the ear that is internal to the eardrum, external to the inner ear’s oval window.. Found in mammals the middle ear has three ossicles, a hollow space in the middle ear called the tympanic cavity. The tympanic cavity is joined to the nasal cavity by the eustachian tube.

MiddleEar
Blausen.com staff. “Blausen gallery 2014″. Wikiversity Journal of Medicine. DOI:10.15347/wjm/2014.010. ISSN 20018762.

The middle ear’s main function is to transfer acoustic energy from waves of compression in the air to membrane waves in the cochlea’s fluid. Other animals have different middle ears that evolved. Early fossil tetrapods, reptiles, and birds possessing a single auditory ossicle, the columella, that connected with the eardrum directly and operating as a evolutionary derivative of a bone in fish ancestors called the “hyomandibula”, which supported the skull as well as brain case. Mammals have a unique middle ear with three ossicles that evolved independently of the single ossicle middle ears that other land vertebrate possessed during the Triassic period.

The Ossicles

The middle ear has three small bones called the ossicles. They are the malleus, the incus, and the stapes. They were given their Latin names according to their distinctive stapes. They are also known as the hammer, the anvil, and the stirrup. These ossicles mechanically convert the energy and vibrations in the ear drum and transfer sound energy from the ear drum to the cochlea’s oval window, where it becomes amplified pressure waves in the inner ear’s fluid using the hydraulic and lever principle..

The middle ear also contains two tiny muscles. The tensor tympani muscle is attached to the hammer and helps tune and protect the ear. The stapedius muscle is attached to the stirrup. This muscle contracts in response to a loud noise, making the chain of ossicles more rigid so that less sound is transmitted. This response, called the acoustic reflex, helps protect the delicate inner ear from sound damage.

Malleus

The malleus is merged with the eardrum and connects to the incus. The incus then connects to the stapes. The eardrum attaches to the malleus handle and the linear attachment smooths out chaotic motion at frequencies that are three kHz or higher, allowing the ear to respond over a wider frequency change linearly than with a point attachment. The malleus or hammer on the inside moves when sound makes the eardrum vibrate.

Incus

The incus connects to the stapes and the malleus. It pushes against the incus, or anvil during eardrum vibrations and the incus sends movements to the stapes.

Stapes

The incus connects to the stapes, or stirrup, where their vibrations introduce pressure waves to the inner ear. Then the stapes push on the inner ear’s fluid through the oval window of the cochlea.

The Tympanic Cavity

This is the hollow space in the middle ear, also known as the cavum tympani. This is a small cavity that surrounds the middle ear’s bones. It is separated by the eardrum and abuts the external auditory meatus.

The Eustachian Tube

This tube helps to join the tympanic cavity to the nasal cavity, the airway at the nose’s back(the nasopharynx). This lets the pressure between the middle ear and the throat equalize and allows outside air to come in behind the eardrum in the middle ear. The eustachian tube opens when you swallow and helps maintain equal pressure on either side of the ear drum as well as preventing fluid from accumulating. The eardrum can uncomfortably retract or bulge if pressure isn’t equal and in the process, distort hearing. Popping of the ears can relive ear drum pressure caused by sudden changes.

The Stapedius and Skeletal Muscles

These muscles may stiffen the ossicles’ movement. The stapedius is the smallest skeletal muscle the body has. It connects tot he scapes at the malleus’ base and is controlled by the medial pterygoid nerve. These muscles contract when they hear loud sounds which reduces the sound traveling to the inner ear. This process is called the Tympanic or acoustic reflex.

Biology of the Outer Ear

The outer ear is the external part of the ear. It is structurally divided into the pinna, or auricle, as well as the ear canal or auditory canal, known as the external auditory meatus, and the outer layer of the eardrum (the tympanic membrane). The outer ear gathers sound energy and focuses it on the tympanic membrane. The function of the outer ear is to collect sound and have it travel through the auditory canal to the tympanic membrane, or eardrum.

Photo by Anatomist90. CC-BY-SA-3.0
Photo by Anatomist90. CC-BY-SA-3.0

The pinna, or auricle, is the visible part of the outer ear and is made up of a thin plate of yellow and elastic cartilage and soft tissue, making it flexible while keeping its shape. This cartilage is covered with integument. It’s connected by ligaments and muscles to surrounding parts and to the external acoustic meatus by way of fibrous tissue. Some mammals can even move the pinna with their auriculares muscles for the purpose of hearing better from a certain direction. Humans cannot do this. The pinna collects the sound vibrations and is the part that guides vibrations to the ear canal and decide the source and direction of sound.

The ear canal or external auditory meatus. This part of the ear is a tube that runs through the middle ear, from the bottom of the auricula inward. It sends the vibrations to the tympanic cavity as well as amplifying frequencies from 3-12 kHz.

The tympanic membrane, or eardrum, is a thin and cone-shaped membrane separating the outer ear from the middle ear for humans and tetrapods. The function of the eardrum is to transmit the sound in the air to the middle ear’s ossicles to the fluid-filled cochlea, where it converts and amplifies vibration to vibration in fluid. The tympanic membrane consists of the upper region of the pars flaccida and pars tensa. The pars flaccida is fragile and has two layers, while the pars tensa region is larger and has the three layers of skin, fibrous tissue, and finally mucosa.

Intrinsic and Extrinsic Muscles

Intrinsic muscles of the outer ear include the helicis major, the helicis minor the tragicus, the antitragicus, the transverse muscle, and the oblique muscle. The helicis major is situated upon the helix’s anterior margin as a narrow vertical band that rises from below and from the spina helicis, inserting into the helix’s anterior border. The helicis minor covers the crus helicis and is an oblique fasciculus. The tragicus lies on the tragus’ lateral surface and is a short and flattened vertical band. The antitragicus rises from the antitragus’ outer part, inserting into the cauda helicis and antihelix. The transverse muscle consists of scattered tendinous and muscular fibers that extend from eminentia conchae to the prominence, situated on the pinna’s cranial surface. Lastly, the oblique muscle is made of a few fibers from the concha’s upper and back part to the convexity above and lays on the cranial surface.

Extrinsic muscles of the outer ear are made up of three muscles that go around the auricula and outer ear, the anterior auricular muscle, the superior auricular muscle, and the posterior auricular muscle. The superior is the largest muscle, and the anterior the smallest. These muscles can adjust the pinna’s directions, however it doesn’t apply as much to humans.

Biology of the Inner Ear

The inner ear is found in all vertebrates, with some variation of form. It is responsible for the senses of hearing and balance. It is structurally divided into the cochlea and the vestibular system. The cochlea is a spiral-shaped structure that senses sound waves and the vestibular system is a group of chambers which sense any disruption in equilibrium.

The Cochlea

Photo by OpenStax College. CC BY 3.0
Photo by OpenStax College. CC BY 3.0

The cochlea converts sound mechanical energy from the middle ear into nerve impulses, which are then sent to the brain through the vestibulocochlear nerve. The movements of the bones in the middle ear push on a membrane called the oval window, which moves the fluids inside the cochlea (called endolymph and perilymph). The pressure waves in these fluids stimulate tiny hair cells inside a sensory organ named the Organ of Cordi. Different frequencies stimulate specific portions of the cochlear spiral, allowing the brain to differentiate between sounds of different frequencies. In humans, this ranges from 20 Hz to 20,000 Hz, although the ability to sense higher frequencies decreases with age.

The Vestibular System

The vestibular system is responsible for the sensation of balance and equilibrium, and in conjunction with stretch receptors in the muscular system and joints, our sense of proprioception (body position, movement, and acceleration). It structurally broken down into several chambers filled with the same fluids as the cochlea. These are called the semicircular canals, the utricle, and the saccule. Tiny otoliths (literally “ear stones”, in Greek) in the fluid respond to gravity and changes in motion and stimulate hair cells, which send impulses down the vestibulocochlear nerve. The brain recognizes the impulses as motion and in concert with the visual system interprets what is happening.

The different structures sense different types of motion. The semicircular canals sense rotation. There are three canals, oriented in three different dimensions to be able to sense all types of rotation. One end of these canals opens onto the utricle and the other end has a structure called the osseous ampullae, which has sensory hair cells. When the head moves, the fluid lags a bit due to inertia and stimulates these cells. This stimulation only lasts a few seconds however, as the fluid soon catches up to the motion of the head. The utricle senses changes in horizontal movement, and the saccule does the same for vertical movements. There is evidence that the vestibular system has retained some ancestral sensitivity to sound waves of very low and very high frequencies which the cochlea cannot perceive.

Hearing Aid Roundup

A hearing aid is an electroacoustic device that can help sound be amplified for the wearer of the hearing aid. It corrects impaired hearing and successfully makes speech more intelligible. These medical devices are FDA-regulated and go back all the way back to the seventeenth century, with the invention of the first hearing aid, the ear trumpet. These external hearing aids blocked out other noises and directed sound towards the ear more efficiently using its funnel shape and would go in or behind the ear. The first electric hearing aid was invented in 1898. Carbon microphones, digital signal processing chips, transmitters, and computer technology have all made the hearing aid what it is today.

Different Types of Hearing Aids

To help you decide which hearing aid to use, here are the different types of hearing aids, along with the pros and cons of each one, according to WebMD.

Body Worn Aids

Body worn aids were invented by Harvey Fletcher at Bell Laboratories and were the first hearing aid invented. They are made up of a case and earmold attached by wire. The case holds the battery, controls, and amplifier components and the earmold has a mini loudspeaker. The size of playing cards, this aid can be carried or worn on a belt.

Pros: These aids can provide long battery life and amplification at a lower cost

Cons: Larger than other aids

Behind The Ear Aids

These aids are made up of a case, earmold/dome and connection between them. The case has the electronics, the controls, the microphone and sometimes loudspeaker. The case is behind the pinna and the connection of the case goes down the front of the ear. The sound is routed acoustically or electrically to the ear.

Pros: Reduced chance of moisture damaging components, greater durability

Easily connected to assistive listening devices

Good hearing aid for children

Cons: Users may not like the way the BTE aids look

On The Ear Aids(Mini BTEs)

This is a new type of mini BTE aid that goes on the ear. It can also fit behind or on the ear. Thin, invisible tubes connect the aid to the ear canal. Mini BTEs have an ear piece for insertion called an open fit. But they can also utilize traditional ear molds. They reduce the sensation of occlusion in the ear canal and reduce feedback.

Pros: Smaller, uses comfortable ear piece insert

Cosmetically satisfactory

Receiver In The Canal/Ear

These hearing aids have a loudspeaker in the ear using soft ear inserts that are usually made of silicone to place the loudspeaker in the patient’s ear. Many patients find that they prefer the open fit technology of the RITC hearing aid over others.

Pros: Improved sound quality with reduced case size

Cons: No fitted earmold

BTE Cross System/ BTE Bi Cross System

This cross system is used for those with hearing loss in one ear and allows users to wear a microphone in one ear. The speech goes to a speaker in the good ear and allows for normal hearing. The Bi Cross system enhances hearing in the good ear by enhancing volume input, increasing clarity and volume.

Pros: Helps user hear normally

In The Ear Aids

These aids fit the concha, or outer ear bowl and are custom made for each ear. They are used in mild to severe hearing loss. Feedback may be a problem, but regulation is available on modern circuits. This ITE aid has a vent placed to provide pressure equalization, with different styles and sizes. These units can b e connected to FM systems wirelessly as well.

Pros: Now available for children due to new silicone-like material that doesn’t have to replaced as child grows

They are smaller than other aids

Cons: Visible sometimes when facing someone

Feedback from sound may happen for severe hearing loss

More expensive than aids worn behind ear due to custom fittings

Invisible In Canal Hearing Aids (IIC)

IIC aids fit inside the ear canal, and are not visible as hearing aids. The shell is custom made to the ear canal and use venting and deep placement to make the hearing experience more natural. The IIC aid does not block the ear with a large plastic shell. Sound is collected naturally by the ear’s shape and travels down to the ear canal with unassisted hearing. Models allow the aid wearer to use their cell phone as a remote control for the volume and memory settings.

Pros: Not visible due to internal insertion

Cons: Do not work well for older people

Extended Wear Hearing Aids

These hearing devices are placed in the ear without surgery. They are the first invisible hearing aid that can be worn for up to three months at a time without having to be removed. Made of soft material, these aids contour to each user and result in improved sound direction and localization as well as improved high frequency gain and reduced feedback. These aids are worn by people who have mild to moderate severe hearing loss. Settings can be altered without professional help and the aids are worn until they are replaced with another in three months or less.

Pros: Reduced feedback, soft material, high frequency

Protect against moisture and earwax so can be worn for multiple activities such as showering

Not visible

Cons: Have to be replaced every three months

Must be removed and reinserted when the battery dies and cannot go underwater

Slightly uncomfortable with the fit sometimes as is deeply inserted into canal

Open Fit Devices

Over The Ear or Open Fit Devices are small and fit behind the ear. They have a small case behind the ear and a small clear tube that runs into the ear canal. The acrylic tip or soft silicone dome holds the tube in place and reduces the occlusion effect.

Pros: Does not feel like it is plugged in the ear

Cons: Open fit devices can have issues when connected to Assistive Listening Devices

Disposable Hearing Aids

These aids have a battery that cannot be replaced. These aids do use power better than traditional hearing aids, and the battery lasts longer. They replace the task of battery replacement and other maintenance issues.

Pros: Battery lasts longer than other hearing aids

Removes maintenance and battery replacement tasks

Cons: Must continually buy new hearing aids

Bone Anchored Hearing Aids

This is an auditory prosthetic that can be surgically implanted and uses the skull for sound travel to the inner ear. This is good for people who have conductive or unilateral hearing loss. Patients can experience numbness around their implant, but this usually disappears with time. The BAHA does not restrict users from active or outdoor activities and can connect to an FM system using a mini FM receiver attachment.

Pros: Children can wear it

Low risk for surgery and minimal pain

Cons: Requires surgery

Tinnitus

Tinnitus
Photo by Ben Husmann. CC BY 2.0

Tinnitus comes from a Latin word that means “ringing”. It is the hearing of sound in the ear when there is no external sound source present. There are multiple types of sounds that can be heard, the most recognizable being ringing but can include other sensations such as buzzing. It is not a disease, rather tinnitus is a condition that can be caused by a range of factors, most commonly from exposure to loud sounds and resulting noise-induced hearing loss. Noise-induced hearing loss can happen as a result of working at a job that includes or is close to a lot of noise, hearing repetitive sounds a lot, listening to headphones or music too loud on a regular basis, going to loud concerts, or any other environment where noise pollution is being created or very loud noise is occurring. Tinnitus can also be a symptom of sensorineural hearing loss.

Causes of Tinnitus

Tinnitus can be caused by so many things, most commonly by exposure to loud noises. But it can also be caused by a wide range of other issues which can include ear infections, oxidative stress, emotional stress, neurological damage, objects in the ear, nasal allergies, wax build up, withdrawal from benzodiazepines, sensorineural or congenital hearing loss, or as a result of medications. Treating causes that are causing the tinnitus to happen may resolve the problem. 10 to 15% of people experience tinnitus.

Tinnitus may also be caused by these afflictions: acoustic shock, earwax impaction, middle ear effusion, superior canal dehiscence, presbycusis, Ménière’s disease, acoustic neuromas, mercury or lead poisoning, whiplash, closed head injury, skull fracture, head injury, multiple sclerosis, giant cell arteritis, temporomandibular joint dysfunction, metabolic disorders, thyroid disease, hyperlipidemia, vitamin B12 deficiency, iron deficiency, depression, anxiety, psychiatric disorders, tension myositis syndrome, vasculitis, fibromyalgia, thoracic outlet syndrome, hypertonia, hypnagogia, migraines, sleep paralysis, glomus tympanicum tumors, anthrax vaccines, psychedelic drugs, high blood pressure, underactive thyroid, ear infections, and more.

There are two types of tinnitus, objective and subjective. Objective tinnitus can be heard by a doctor, a sound that is perceived coming from the ears with a stethoscope. With subjective tinnitus, only the person suffering from tinnitus can hear it.

Symptoms of Tinnitus

  • Ringing in the ears, buzzing, whistling, hissing, humming, tinging, whining, or roaring
  • Intermittent or continuous sounds in the ear
  • May cause fatigue, depression, musical hallucinations, irritability
  • Sleep disturbance
  • Difficulty concentrating
  • Anxiety

Treatment for Tinnitus

You should make an appointment with a doctor if you believe you have any of the symptoms of tinnitus. Tinnitus could be occurring as the result of a health problem, appearing as a symptom of whatever other deeper issue is going on. According to WebMD, if the tinnitus is occurring along with pain or a drainage from your ear, this may be a sign that you have an ear infection. If the noise comes with dizziness, you should seek medical care as soon as the symptoms appear.

A physician will ask you questions about your tinnitus and examine you and subsequently diagnose you with tinnitus as your primary affliction or something else. Treatment for tinnitus can vary. Your doctor may clean out your ears with a curette if you have earwax, and if you have an infection you will be prescribed hydrocortisone ear drops and an antibiotic. Surgery may be called for in some cases. If you have tinnitus because of temporomandibular joint syndrome, your doctor may refer you for other treatment. Your doctor may also recommend a special medication for tinnitus, such as Valium, Elavil, steroids, alprazolam, misoprostol, and more, or give you a hearing aid if your tinnitus is due to hearing loss. A tinnitus masker may be given to you, and Tinnitus Retraining Therapy may help people be treated and helped to habituate signals and filter them out.

Other types of treatment may include cognitive therapy, biofeedback, dental treatment, cochlear implants, and alternative treatments. Cognitive therapy helps people to manage their reaction to tinnitus, and is often combined with other types of therapy. Biofeedback lets people manage stress and change their reaction to it via a relaxation technique. Dental treatment may be advised for afflictions such as TMJ. Cochlear implants may help people suffering from hearing loss and tinnitus. Alternative treatments can include herbs, zinc, magnesium, magnets, acupuncture and hypnosis.

What Is Industrial Deafness

Industrial deafness is a type of hearing loss that is caused by industrial noise. Industrial noise is a term used to describe a noise that is pervading an environment and safety range. It’s more than just a sound that is irritating to you, as prolonged exposure can cause permanent hearing damage. Occupational and industrial noise is noise that is associated with a profession and can cause workplace hearing loss. Noise is hazardous to worker’s safety and health. Noise can also cause stress and raise blood pressure in addition to impairing hearing when exposed to noises of 85 decibels or over for the long term. IT can also cause work accidents by masking warning signals as well as hazards and getting in the way of workers’ ability to concentrate.

In cases of Industrial Hearing Loss, the inner ear becomes damaged as a result of exposure to intense sounds (noise). The inner ear has tufts on the cells which pick up noise and pass this information on to the brain for processing. They are like tiny hairs and can be compared with stands of grass in a field. The grass can withstand ordinary levels of wind and will stand up again when the wind has passed, but if the wind is too strong, the grass will blow down and not stand up again. Similarly, if the noise is too intense, the hairs in the inner ear will not stand up again and hearing loss will follow.

Causes of Industrial Deafness

Industrial deafness can be caused while working. You may be at risk for industrial deafness if: your working day is filled with intrusive noise, you have to raise your voice in order for other people to hear you at what is normally a conversational distance, you use power tools that make a lot of noise for more than 30 minutes a day, or if you work close to sounds of impact on a regular basis. Regular deafness can occur as part of aging, but industrial deafness, but people who work in environments were power tools are frequently used or loud noises occur are at risk for externally caused deafness. Sources of noise that go over 80 decibels will put you at risk for industrial deafness. There are four types of industrial deadness: tinnitus, acoustic trauma, permanent hearing loss, and temporary hearing loss. Extremely loud noises or exposure to constant noise can cause industrial deafness. Industries that can put you at risk for industrial deafness include construction, mining, engineering, electrical work and plumbing, factories, railway and transport workers, heavy machinery operators, the airline industry, agriculture, farm work, and more.

Symptoms of Industrial Deafness

  • Lack of hearing in one ear or both
  • Other people complain that you have the tv or the radio turned up too loud
  • Conversation is either difficult to hear or impossible
  • Trouble hearing someone on the other end of the telephone
  • A ringing or other sound in your ears such as buzzing (tinnitus)
  • Temporary or permanent lack of hearing
  • Difficulty hearing speech when there is background noise
  • Not being able to hear parts of or full sentences in conversation
  • Difficulty hearing sounds like “T”, “D” and “S”

Treatment for Industrial Deafness

If you have any sort of hearing loss or believe that you may have industrial deafness, see an ear, nose and throat doctor. They will help you determine if you have industrial deafness. If you cannot hear certain frequencies in life, you may have this condition. The doctor will ask you about your history and your work, and conduct an examination or refer you to another doctor who may do a sound test and conduct either sound therapy or fit you with a hearing aid.

Cochlear_ear_implant_with_accessories
Cochlear ear implant with accessories. Photo by Wellcome Images. CC-BY-4.0

If the inner ear is too damaged, your doctor may recommend that you get a cochlear implant. This type of implant will bypass the ear’s damaged portions and stimulate the auditory nerve that passes sound along to the brain. An implant will send the information along to the electrodes placed in the inner ear to help adults with hearing impairment or deafness hear, although it may take some time to get used to interpreting these signals as sound.

There isn’t much that can be done for someone with industrial hearing loss to reverse the damage once it has occurred. Try to prevent industrial deafness before it happens by using aural protective gear such as ear plugs and ear defenders to protect your ears from damaging sound.

What is Sensorineural Hearing Loss

Sensorineural hearing loss, or SNHL, is a type of hearing loss. The cause of it usually is coming from the vestibulocochlear nerve, the inner ear, or the brain’s central processing centers. The severity of this type of hearing loss can range from mild to moderate to severe and completely deaf. Most types of sensorinueral hearing loss come from the cochlea’s hair cells in the organ of Cort. These hairs may have abnormalities that cause this type of hearing loss.

Symptoms of Sensorineural Hearing Loss

  • Babies may fail to respond to sounds
  • No baby babbling or baby noises
  • Sounds that are heard are quieter, less clear, distorted
  • Sounds of “s, f, and z” aren’t heard
  • High tones less audible
  • Tinnitus
  • Speech difficult to understand with background noise
  • Vertigo, dizziness, loss of balance
Cochlea cross section. Photo by   Oarih. CC BY-SA 3.0
Cochlea cross section. Photo by Oarih. CC BY-SA 3.0

Causes of Sensorineural Hearing Loss

A lot of sensorineural hearing loss is because of the hair cells functioning poorly due to damage or abnormalities that occur from birth. External damaging causes can be infection and noise-induced trauma, or could be due to intrinsic abnormalities, such as genetics. Sensorineural hearing loss can also happen due to abnormalities that occur in the central auditory system of the brain, called central hearing impairment. Prolonged exposure to loud noise can also cause this type of hearing loss. Other causes include:

  • Head trauma
  • Autoimmune inner ear disease
  • A virus
  • Disease
  • Loud noise exposure
  • Aging
  • Inner ear malformation
  • Tumors
  • Otosclerosis (hereditary disorder where bone growth forms around middle ear bone, preventing vibration stimulated by sound)
  • Ménière’s disease
  • Genes
  • Illnesses
  • Drugs or medications that are hearing-toxic
  • Autoimmune disorders such as lupus, rheumatoid arthritis, Cogan’s syndrome, and more
  • Auditory portions of brain

Treatment of Sensorineural Hearing Loss

Diagnosis of SNHL is done by going to a doctor, who will note medical history, do an ear exam, and ask about hearing problems in your family history. A head CT scan or MRI may be conducted, as well as an EEG test for hearing. Researchers believe that high doses of vitamins A, C, E, and magnesium taken an hour before exposure to loud noise and continued as treatment can prevent noise-induced hearing loss on a permanent basis.

Treatment depends on the type of sensorineural hearing loss. Studies are currently being done on how gene therapy and stem cells can be used to regenerate hair cells but are not available yet. Hearing aids can amplify sounds and overcome hearing loss in that range, as can cochlear implants to directly stimulate the cochlear nerves. Idebenone with vitamin E may delay or reverse hearing loss but is currently categorized as experimental. Immediate hearing loss treated within 24 hours with steroids can be reversed, according to audiologist and ENTs.

Emergency surgery may work when it comes to sensorineurral hearing loss from head trauma or air pressure changes. Several types of hearing loss are treated with drug therapy and long or short term corticosteroids. Ménière’s disease may be treated medically. If hearing loss is minor, hearing may be saved in half of cases by undergoing hearing preservation surgery.

What is Conductive Hearing Loss

Conductive Hearing Loss is a type of hearing loss. It is caused by a problem with either the ear canal, eardrum, or the middle ear. These problems involve difficulty in conducting sound waves and carrying them to the inner ear. These issues can occur anywhere along the way to the inner ear, from the outer ear to the tympanic membrane or eardrum to the middle ear. It may occur in conjunction with sensorineural hearing loss or on its own. Conductive Hearing Loss may be caused by a variety of issues, from an infection in the ear to fluid, objects, trauma, tumors, or wax build up in the ear.

conductive hearing loss
Human ear anatomy with detailed diagram. Photo by Iain. CC BY-SA 3.0

Causes of Conductive Hearing Loss

In the external ear:

  • Cerumen(ear wax)
  • Ear infections
  • A foreign object in the external auditory canal
  • Tumor in ear canal
  • Exostoses
  • Congenital or Choanal atresia
  • Swimmer’s ear

In the Tympanic Membrane:

  • Perforation
  • Retraction
  • Membrane tension due to different pressures

In the Middle Ear:

  • Fluid accumulation
  • Ear infections
  • Blocking of the eustachian tube
  • Allergies
  • Tumors
  • Increased pressure
  • Acule otitis media
  • Serous otitis media
  • Cholesteatoma
  • Otosclerosis
  • Middle ear tumor
  • Temporal bone trauma

In the Inner Ear:

  • Superior canal dehiscence
  • Otosclerosis

Symptoms of Conductive Hearing Loss

Symptoms of severe hearing loss can appear singularly or together. People who are experiencing hearing loss often withdraw from their friends and family and stop going out or doing things like they were before because they are embarrassed and don’t want to ask people to speak up or repeat themselves and withdraw instead to avoid feeling that way. They are often nervous that they will not be able to hear the conversation and answer in the wrong way or have to pretend like they know what is going on, which makes them feel foolish. You may be having trouble hearing conversations, with sounds being muffled and fading out. If you believe that you are suffering from Conductive Hearing Loss or any type of hearing loss or these symptoms, go see your primary care physician to get a diagnosis, seek treatment, and fix the problem. You don’t have to live with Conductive Hearing Loss.

Treatment for Conductive Hearing Loss

Before treatment, your doctor may order an audiogram, a type of hearing test designed to help him diagnose your condition.

Treatment for conductive hearing loss changes depending on what is causing the conductive hearing loss. Hearing aids may be a possible treatment if deformation of ear structures cannot be fixed. When there is an infection, medications that are antibiotic or antifungal in nature may be prescribed to you. If it is from head trauma, then getting surgery may be an option for you. Cochlear implants can stimulate cochlear nerves as well and may help to fix conductive hearing loss. Stem cell and gene therapy hair cell regeneration may be a possibility in the future but is not yet medically feasible. However, studies are being done. A surgically implanted osseointegrated device may be implanted to help treat Conductive Hearing Loss as well.

A Blog For The Hard Of Hearing