Question

How can one identify a person in a dark room?

Answer 1

We cannot see anything in the dark room, so it is the other senses of us that we must use to identify a person in the dark room. The most important sense that we can use in this situation is hearing because everyone has a different voice quality and thus, we can identify the person easily.

Complete step by step answer:
When we are in a dark room there is nothing, we can see other than darkness, so what a person must do if one has to identify someone in a dark room. The answer lies in what others senses we can use for identification of a person. We can use our sense of hearing for that because the sound can also help in distinguishing people.
Each of the person has different quality of sound, the pitch of the sound can be same of two people, the amplitude of the sound can be same for different people, the loudness can also be same for different people but the quality that is the timbre is always different for each person it can never be same which act as the fingerprint for every person and thus the person can be identified.
Timbre is defined as the characteristic of sound that helps the ear to distinguish between different sounds which have same pitch and loudness. It is also called the tone color and tone quality of a person. It is the quality of auditory sensation produced by the tone of a sound wave. The timbre of a sound depends on the form of waves, that varies with the number of overtones that are present, their frequencies and their relative intensities.
The vibration of the sound waves is very complex, the sound vibrates at several frequencies simultaneously. The additional frequencies are called overtones and harmonics. The relative strengths of these overtones help to determine a sound’s timbre.

Note: For identification of a person it is hearing sense what we use but for identification of things which cannot speak what we can use is the sense of touch, each of the thing can be identified by touching because everything has different shape and size which we can identify by feeling it.