Audiology Hearing Aids: Assessment, Fitting, Styles, and Rehabilitation

What is aural rehabilitation?

A therapeutic process aimed at helping individuals with hearing loss improve their ability to communicate and function in daily life.

What is an assistive listening device?

A device designed to improve hearing ability by amplifying sound, often used in conjunction with hearing aids.

What does monaural mean?

Relating to or involving one ear.

What does binaural mean?

Relating to or involving both ears.

What is unilateral hearing loss?

Referring to hearing loss or hearing aid use in one ear only.

What is bilateral hearing loss?

Referring to hearing loss or hearing aid use in both ears.

What does symmetric hearing loss mean?

Referring to hearing loss that is similar in degree and type in both ears.

What does asymmetric hearing loss mean?

Referring to hearing loss that differs in degree or type between the two ears.

What is impairment of structure?

Damage or dysfunction in the physical components of the auditory system.

What is impairment of body function?

A reduction in the ability of the auditory system to process sound.

What is an activity limitation?

Restrictions in an individual's ability to perform tasks or activities due to hearing loss.

What is a participation restriction?

Limitations in an individual's involvement in life situations due to hearing loss.

What are digital hearing aids?

Hearing aids that use digital technology to process sound, providing clearer and more customizable amplification.

What are analog hearing aids?

Hearing aids that amplify sound in a continuous manner, using analog technology.

What is acoustic feedback?

A whistling sound that occurs when sound from a hearing aid's speaker is picked up by its microphone.

What is occlusion?

The blockage of sound in the ear canal, often experienced when wearing hearing aids.

What is the occlusion effect?

The perception of increased loudness of one's own voice or sounds due to the blockage of the ear canal.

What is the hearing aid effect?

The perception that sounds are amplified too much or sound unnatural when using hearing aids.

What are linear hearing aids?

Hearing aids that provide a constant gain across all frequencies.

What are nonlinear hearing aids?

Hearing aids that provide varying levels of gain depending on the input sound level and frequency.

What is an earmold?

A custom-made piece that fits in the ear canal to hold a hearing aid in place and improve sound quality.

What is an earmold impression?

A mold taken of the ear canal to create a custom earmold for a hearing aid.

What is output in relation to hearing aids?

The sound level produced by a hearing aid.

What is gain in hearing aids?

The amount of amplification provided by a hearing aid.

What is frequency response?

The range of frequencies that a hearing aid can amplify effectively.

What is verification in audiology?

The process of confirming that a hearing aid is functioning as intended through objective measurements.

What is validation in audiology?

The process of confirming that the hearing aid meets the user's needs and preferences through subjective feedback.

What is a real-ear measurement system?

A method used to measure the performance of a hearing aid in the user's ear.

What is a Hearing Aid Test Box?

A device used to test the performance of hearing aids in a controlled environment.

What is frequency in audiology?

Pitch, measured in Hertz (Hz). Low frequencies represent low-pitched sounds, and high frequencies represent high-pitched sounds.

What is intensity in audiology?

Loudness level, measured in decibels (dB HL).

What are hearing thresholds?

The softest sounds a person can hear at different frequencies.

What does degree of hearing loss refer to?

Based on how elevated the hearing thresholds are.

What are the types of hearing loss?

Conductive, sensorineural, and mixed.

What is configuration in audiology?

The pattern of hearing thresholds across frequencies, such as flat, sloping, or rising.

What is lateralization?

The perception of whether a sound is heard in the right ear, the left ear, or centered within the head.

What is symmetry in hearing loss?

The degree of hearing loss being the same in both ears.

What is the pure-tone average (PTA)?

The average hearing threshold across selected frequencies, commonly 500, 1000, and 2000 Hz.

What is the speech reception threshold (SRT)?

The softest level at which a person can correctly identify 50% of familiar two-syllable words.

What is the difference between audiologic management and diagnostic audiology?

Audiologic management focuses on treatment and rehabilitation, while diagnostic audiology emphasizes assessment and diagnosis.

What is extrinsic motivation?

Motivation driven by external rewards, such as a spouse wanting someone to wear hearing aids.

What is intrinsic motivation?

Motivation that comes from internal satisfaction, such as a patient wanting to wear hearing aids.

What are formal assessments in audiology?

Standardized tests like COSI and HHIE-A used to collect information consistently.

What are informal assessments in audiology?

Observations or conversations used to gather information about a person's communication needs.

What are examples of situations where prognosis for benefit from hearing aids might be limited?

Cochlear dead regions, Meniere's disease, insufficient hearing loss, or excessive hearing loss.

What are cochlear dead regions?

Specific areas along the basilar membrane where inner hair cells are completely absent.

What happens when amplifying frequencies within a dead region?

It causes severe distortion rather than speech clarity because neighboring low-frequency hair cells are abnormally stimulated.

What characterizes Meniere's Disease?

Fluctuating low-frequency sensorineural loss, severe vertigo, tinnitus, and endolymphatic hydrops.

What makes stable acoustic amplification difficult in Meniere's Disease?

Unpredictable fluctuation in thresholds.

What is considered borderline normal hearing sensitivity?

Thresholds better than 25-30 dB HL across speech frequencies.

What defines too much hearing loss?

Thresholds exceeding 90-100 dB HL with 0% to near-zero word recognition scores.

What is active ear draining?

Continuous purulent fluid discharge that destroys internal hearing aid electronics.

What factors should be assessed for treatment needs?

Listening demands, financial resources, physical status (dexterity), etc.

What listening demands require advanced hearing aid features?

Active social and noisy work environments.

What advanced features may be needed in hearing aids for noisy environments?

Multi-channel directional microphones, noise reduction, Bluetooth.

What dexterity issues should be considered for hearing aid users?

Clients' ability to use tiny knobs to put in or take out the hearing aids.

What financial resources should be considered for hearing aid selection?

Clients' budget and willingness to spend out of pocket.

What is the typical process for getting hearing aids?

Evaluation, needs assessment, selection, fitting and programming, orientation, follow-up, ongoing management.

What is the function of a hearing aid microphone?

Picks up sound from the environment.

What does the processor/amplifier in a hearing aid do?

Processes sound and adjusts amplification.

What is the role of the receiver in a hearing aid?

Converts the processed electrical signal into sound.

What provides energy to operate a hearing aid?

Battery or rechargeable power source.

What is the purpose of an earmold or dome in a hearing aid?

Helps deliver sound into the ear and contributes to the fit and acoustic seal.

What are the styles of hearing aids?

BTE, RIC/RITE, ITE, ITC, CIC, IIC.

What are directional microphones in hearing aids used for?

Emphasize sound coming from particular directions.

What does noise reduction do in hearing aids?

Reduces certain background-noise components to improve listening comfort.

What is feedback cancellation in hearing aids?

Helps reduce whistling or squealing.

What should be included in hearing aid orientation?

Care and maintenance, warranty info, insertion, basic controls.

What are appropriate expectations for hearing aid use?

Hearing aids make sounds more accessible but do not restore normal hearing.

When is hearing aid use judged to be successful?

Improved speech sounds, goal achievement, improvement in quality of life.

What are the benefits of binaural hearing?

+3dB loudness, binaural squelch, localization, elimination of the head shadow effect.

What are limitations of hearing aids?

Hearing cannot be restored, occlusion effect, amplifies unwanted sounds.

How is a hearing aid fitting verified?

Using a hearing aid test box or real-ear measurement.

What is validation in hearing aid fitting?

Determining if the device helps in real-life situations.

What are the advantages of the hearing loss classification system?

Style chosen to maximize benefits, technology matched to client needs.

What are the disadvantages of the hearing loss classification system?

Larger style stigma, battery life issues, occlusion effect.

How can you communicate the impact of hearing loss to teachers or parents?

Using audio simulation, explaining signal to noise ratio effects.

What is the description of Behind-The-Ear (BTE) hearing aids?

Custom molding; microphone behind the ear; thick tubing going from microphone to receiver.

What is the description of In-The-Ear (ITE) hearing aids?

Fits in the outer ear and is molded to fit the user's ear.

What is the description of Receiver-In-Canal (RIC) hearing aids?

Small receiver in the ear canal; small, thin tubing leading to the rest of the hearing aid behind the ear.

What is the description of In-The-Canal (ITC) hearing aids?

Small device that fits partly into the ear canal.

What is the description of Completely-In-The-Canal (CIC) hearing aids?

Smallest style; fits entirely inside the ear canal.

How can you identify a Behind-The-Ear (BTE) hearing aid?

Main device sits behind the ear; thick tubing connects to an earmold.

How can you identify an In-The-Ear (ITE) hearing aid?

Fits in the outer ear and is custom-molded.

How can you identify a Receiver-In-Canal (RIC) hearing aid?

Main device sits behind the ear, while the receiver is in the ear canal; uses a thin wire.

How can you identify an In-The-Canal (ITC) hearing aid?

Fits partly inside the ear canal.

How can you identify a Completely-In-The-Canal (CIC) hearing aid?

Fits entirely inside the ear canal; smallest style listed.

What is the main clue for identifying a BTE hearing aid?

Thick tubing.

What is the main clue for identifying a RIC hearing aid?

Thin wire.

What is the main clue for identifying an ITE hearing aid?

Fills outer ear.

What is the main clue for identifying an ITC hearing aid?

Partially inside.

What is the main clue for identifying a CIC hearing aid?

Smallest style.

Which hearing aid has thick tubing and an earmold?

Behind-The-Ear (BTE)

Which hearing aid fits in the outer ear and is custom-molded?

In-The-Ear (ITE)

Which style has a receiver in the ear canal and a thin wire?

Receiver-In-Canal (RIC)

Which style fits partly inside the ear canal?

In-The-Canal (ITC)

Which is the smallest style and fits entirely inside the ear canal?

Completely-In-The-Canal (CIC)