HIS Hearing Aid Technology & Electroacoustics 2

Question 1

What is the purpose of a hearing aid program or memory?

Accepted Answer

To provide different sets of amplification and processing settings optimized for specific listening environments, switchable by the user or automatically

Answer

Hearing aid programs store different configurations of gain, compression, noise reduction, and directionality settings tailored to specific acoustic environments (e.g., quiet, noise, music, telephone), which the user can switch between as needed.

Question 2

What is the difference between analog and digital hearing aids in terms of programmability?

Accepted Answer

Analog aids use fixed circuits with limited adjustability (trimmers); digital aids are fully programmable via software with extensive parameter control

Answer

Analog hearing aids use fixed or trimmer-adjustable circuits, while digital aids are software-programmable via proprietary fitting software, allowing fine control over hundreds of parameters without any hardware changes.

Question 3

What is battery size 312 commonly used for and what is its typical lifespan?

Accepted Answer

Small RIC and small BTE hearing aids; approximately 5-7 days depending on usage

Answer

Size 312 zinc-air batteries (brown tab) are used in small RIC, open-fit BTE, and some CIC hearing aids; they typically last 5-7 days with moderate to heavy daily use of approximately 16 hours per day.

Question 4

What does the term equivalent input noise (EIN) measure in hearing aid specification?

Accepted Answer

The internal electronic noise floor of the hearing aid, expressed as the input level that would produce the same output level as the circuit noise alone

Answer

Equivalent Input Noise (EIN) represents the hearing aid's internal electronic noise level, expressed as an equivalent input SPL. Lower EIN values indicate quieter electronics, which is important for patients with mild hearing loss who use low gain settings.

Question 5

What is frequency transposition or frequency lowering technology in hearing aids?

Accepted Answer

A processing strategy that shifts or compresses inaudible high-frequency sounds to lower frequencies where the patient has better hearing, to improve consonant audibility

Answer

Frequency lowering moves high-frequency speech information (e.g., /s/, /sh/ consonants) that is inaudible even with maximum amplification to lower frequencies where residual hearing exists.

(HIS) Hearing Instrument Specialist Certification Practice Test

(HIS) Hearing Instrument Specialist Certification Practice Test

HIS Hearing Aid Technology & Electroacoustics 2