ABA Safety Systems & Standards 2

Question 1

Which OSHA permissible exposure limit (PEL) for noise uses a 5 dB exchange rate over an 8-hour TWA?

Accepted Answer

90 dBA

Answer

OSHA's PEL is 90 dBA TWA with a 5 dB exchange rate, meaning each 5 dB increase halves the allowable exposure time.

Question 2

Under OSHA's Hearing Conservation Amendment, audiometric testing must be provided to workers exposed at or above what action level?

Accepted Answer

85 dBA TWA

Answer

OSHA's action level is 85 dBA TWA, triggering requirements for audiometric testing, training, and hearing protection.

Question 3

What is the maximum sound pressure level allowed for audiometric test booth ambient noise in the low-frequency octave band centered at 500 Hz per ANSI S3.1?

Accepted Answer

29 dB SPL

Answer

ANSI S3.1 specifies that ambient noise in test booths at 500 Hz must not exceed 29 dB SPL to avoid masking during threshold testing.

Question 4

Which standard governs the acoustic performance requirements for audiometric test enclosures in the United States?

Accepted Answer

ANSI S3.1

Answer

ANSI S3.1 specifies maximum permissible ambient noise levels inside audiometric test rooms to ensure valid threshold measurements.

Question 5

A worker's noise dose reading is 50% at the end of a shift. According to OSHA, this is:

Accepted Answer

Below the PEL but above the action level if TWA ≥ 85 dBA

Answer

A 50% dose equals an 85 dBA TWA, which meets OSHA's action level threshold triggering hearing conservation program requirements.

(ABA) American Board of Audiology Practice Test

(ABA) American Board of Audiology Practice Test

ABA Safety Systems & Standards 2