People, Development and Environment
9.79
ASSESS YOUR LEARNING
(c) Sounds over 85 dB can harm our hearing,
depending on how loud they are and how long
we hear them.
(d) All of the above.
155.
Match the following activities with their typical
sound levels in decibels (dB):
List-I
(Activities)
List-II (Decibel Levels)
A.
Hearing Threshold
I.
0 dB
B.
Whispering
II.
30 dB
C.
Normal
Conversation
III.
60 dB
D.
Interfering with
Sleep
IV.
30 to 50 dB
(a) A – I, B – II, C – III, D – IV
(b) A – II, B – I, C – IV, D – III
(c) A – I, B – III, C – II, D – IV
(d) A – I, B – II, C – IV, D – III
156.
In the framework of the ...
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