Noise Measurement and Control Flashcards
6 cards from real CAOHC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Noise Measurement and Control flashcards as text
What instrument is used to measure a worker personal noise exposure over a full work shift?
Answer: A noise dosimeter
A noise dosimeter is a body-worn instrument that continuously measures and integrates sound levels to calculate cumulative noise dose.
What is the A-weighting network on a sound level meter designed to approximate?
Answer: The frequency response of the human ear at moderate sound levels
A-weighting adjusts sensitivity across frequencies to approximate how the human ear perceives loudness.
What is the hierarchy of noise controls from most to least effective?
Answer: Elimination, substitution, engineering controls, administrative controls, PPE
The hierarchy ranks methods from most effective (elimination) to least effective (PPE).
During a noise survey, what is the slow response setting on a sound level meter used for?
Answer: To average fluctuations and provide a more stable reading
Slow response uses a 1-second time constant to average rapid fluctuations.
What is an octave band analysis used for in a hearing conservation program?
Answer: To identify frequency content of workplace noise for selecting controls and protectors
Octave band analysis breaks the noise spectrum into frequency bands for targeted engineering controls and protector selection.
Before taking noise measurements, what must be done to ensure accuracy?
Answer: Calibrate using an acoustic calibrator at the beginning and end of measurements
Sound level meters must be field-calibrated before and after each measurement session using an acoustic calibrator.