16. Noise is
A. an unwanted noise B. an irritant C. a source of stress D. all of the above
17. Sound is measured in
A. Hertz B. Decibel C. ppm D. none of the above
18. Following scale is used for loudness of sound or music
A. Linear scale B. Logarithmic scale C. exponential scale D. none of the above
19. The level of sound during conversation is
A. 20 dbA B. 40 sbA C. 60 dbA D. 80 dbA
20. Allowed noise level by WHO is residential areas is
A. 25 dB B. 50 dB C. 75 dB D. 100 dB
A. an unwanted noise B. an irritant C. a source of stress D. all of the above
17. Sound is measured in
A. Hertz B. Decibel C. ppm D. none of the above
18. Following scale is used for loudness of sound or music
A. Linear scale B. Logarithmic scale C. exponential scale D. none of the above
19. The level of sound during conversation is
A. 20 dbA B. 40 sbA C. 60 dbA D. 80 dbA
20. Allowed noise level by WHO is residential areas is
A. 25 dB B. 50 dB C. 75 dB D. 100 dB
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Answer:
16.A
Sound is what we hear. Noise is unwanted sound. The difference between sound and noise depends upon the listener and the circumstances. Rock music can be pleasurable sound to one person and an annoying noise to another. In either case, it can be hazardous to a person's hearing if the sound is loud and if they are exposed long and often enough.
Answer:
1.A
2.B
3.D
4.C
5.35 db
Explanation:
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