Human response to hearing is

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KVS TGT WET (Work Experience Teacher) 8 Jan 2017 Official Paper

Answer 1

The audible frequency range is roughly 20 Hz - 20 kHz for Humans. The human ear is most sensitive to sounds between 1000 and 5000 Hz.
Routine investigation for hearing loss usually involves an audiogram which shows threshold levels relative to a normal.
How our ears perceive sound can be more accurately described by the logarithm of the intensity rather than directly to the intensity. The sound intensity level β in decibels of a sound having an intensity I in watts per meter squared is defined to be β(dB) = 10 log10(I/I0).
When two or more waves traverse the same medium, the displacement of any element of the medium is the algebraic sum of the displacements due to each wave.