Question

with which characteristic property of sound we can identify a person while talking in the phone?

Answer 1

Sound waves are often simplified to a description in terms of sinusoidal plane waves, which are characterized by these generic properties: Frequency, or its inverse, wavelength. Amplitude, sound pressure or Intensity.

Answer 2

we can recognize a person without seeing him on the basis of a special quality of timber of his voice .
the quality or Timber is the characteristics of musical sound which enables us to distinguish between sound of same pitch and loudness .
the quality or timbre of musical sound depends on the mixture of frequencies present in it .
1)loudness

2)pitch
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