CAOHC Audiometric Booth and Equipment Calibration

Question 1

What is the maximum permissible ambient noise level for the 500 Hz octave band in an audiometric test room according to ANSI S3.1?

Accepted Answer

40 dB SPL

Answer

50 dB SPL

Answer

25 dB SPL

Answer

60 dB SPL

Question 2

How often must audiometers used in occupational hearing conservation programs receive exhaustive calibration?

Accepted Answer

At least annually

Answer

Every 5 years

Answer

Only when purchased new

Answer

Monthly

Question 3

What is the purpose of the daily biological calibration check of an audiometer?

Accepted Answer

To verify the audiometer is functioning within acceptable limits by testing a person with known, stable hearing

Answer

To calibrate the audiometer to a specific worker's hearing levels

Answer

To replace the need for annual electroacoustic calibration

Answer

To test the audiometric booth's noise isolation

Question 4

What is the maximum allowable deviation from reference values during a daily functional check of an audiometer?

Accepted Answer

Plus or minus 10 dB at any test frequency

Answer

Plus or minus 5 dB at any test frequency

Answer

Plus or minus 15 dB at any test frequency

Answer

Plus or minus 20 dB across all frequencies combined

Question 5

Which ANSI standard governs the specifications for audiometers used in hearing conservation programs?

Accepted Answer

ANSI S3.6

Answer

ANSI S3.1

Answer

ANSI S1.4

Answer

ANSI S12.6

Question 6

What is the primary purpose of an audiometric test booth?

Accepted Answer

To reduce ambient noise to levels that allow valid hearing threshold measurements

Answer

To amplify the audiometric test signals

Answer

To provide privacy for the worker during testing only

Answer

To eliminate the need for calibrated audiometers