Q.

Least audible sound for most of the human ear is –

A. 10.0 μ bar
B. 0.0002 μ bar
C. 0.005 μ bar
D. 5.0 μ bar
Answer» B. 0.0002 μ bar
Explanation: Least audible sound for most of the human ear is 2 x 10-5 pascal. The generally accepted standard range of audible frequencies is 20 to 20,000 Hz.
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