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Byju's Answer
Standard VIII
Physics
Prevention of Noise Pollution
Loudness beco...
Question
Loudness becomes painful above how many decibles?
A
60
d
B
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B
250
d
B
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C
80
d
B
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D
20
,
000
d
B
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Solution
The correct option is
B
80
d
B
When the loudness of a sound exceeds
80
dB, it becomes painful and intolerable.
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0
Similar questions
Q.
Sound having loudness above 80dB is called
___
Q.
Above _____
d
B
the sound becomes physically painful
Q.
The power , or loudness, of sound is measured on a scale of increased by a factor of 100
(
=
10
2
), the sound is called twice as loud and when it increases 10,000
(
=
10
4
)
times it is called four times as loud. The exponent of ten is called a bel and one decible is one tenth of a bel. Zero decible is chosen as the intensity of the slowest sound which is just audible or is on the threshold of hearing whereas the intensity of loudest sound is about 170 decibel. Sound intensities above a level of nearly descibels produce a feeling of pain :
Q.
How many times more intense is a
60
d
B
sound than a
30
d
B
sound?
Q.
Sound can be painful to hear, and causes ear damage, when its loudness exceeds ________.
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