AP 110 Noise and Vibration Flashcards
1
Q
Noise is ___
A
Unwanted sound
2
Q
What are the primary characteristics of noise concerning crewmembers?
A
-Intensity
-Frequency
-Duration
3
Q
Define frequency
A
The number of times (each sound) compression and rarification of air occurs
4
Q
What is noise (sound) intensity measured in
A
Decibels
5
Q
Two types of hearing loss
A
-Conductive
-Sensorineural
6
Q
Max time of unprotected exposure to 97 dB before having to leave is ___
A
30 minutes
7
Q
Most practical method of noise protection for you?
A
Combination of protective devices
8
Q
Describe vibration
A
-Approximate range hazardous to humans is 1 to 100HZ
-Occurs throughout the frequency spectrum
9
Q
Effects of severe vibrations on crewmember performance
A
-Blurred vision and degraded visual acuity
-Major contributor to fatigue
