CAOHC Noise Measurement and Control 2

Question 1

What instrument is used to measure a worker personal noise exposure over a full work shift?

Accepted Answer

A noise dosimeter

Answer

A noise dosimeter is a body-worn instrument that continuously measures and integrates sound levels to calculate cumulative noise dose.

Question 2

What is the A-weighting network on a sound level meter designed to approximate?

Accepted Answer

The frequency response of the human ear at moderate sound levels

Answer

A-weighting adjusts sensitivity across frequencies to approximate how the human ear perceives loudness.

Question 3

What is the hierarchy of noise controls from most to least effective?

Accepted Answer

Elimination, substitution, engineering controls, administrative controls, PPE

Answer

The hierarchy ranks methods from most effective (elimination) to least effective (PPE).

Question 4

During a noise survey, what is the slow response setting on a sound level meter used for?

Accepted Answer

To average fluctuations and provide a more stable reading

Answer

Slow response uses a 1-second time constant to average rapid fluctuations.

Question 5

What is an octave band analysis used for in a hearing conservation program?

Accepted Answer

To identify frequency content of workplace noise for selecting controls and protectors

Answer

Octave band analysis breaks the noise spectrum into frequency bands for targeted engineering controls and protector selection.

CAOHC - Council for Accreditation in Occupational Hearing Conservation Practice Test