Question

Sound of siren and whistle are different as we perceive and can be easily differentiated, this

difference is mainly due to

a) Sounds of different amplitude and frequency

b) Sounds of different amplitude only

c) Sounds different frequency only

d) Difference if ear structure of humans​

Answer 1

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$\fbox{\rm option \:a)\: is \:correct}$

Sound of siren and whistle are different as we perceive and can be easily differentiated, this difference is mainly due to Sounds of different amplitude and frequency

Explanation :

• A difference in sound mainly depends on four factors → Frequency(pitch), Amplitude, timbre(Tone Color), & Duration(Tempo/Rhythm).
• Since, it is not a talk about music, timbre & Duration can be neglected.
• Frequency(Pitch) is the quality that enables us to judge sounds as being “higher” and “lower. 
• The amplitude of a sound wave determines its relative loudness. 
• Hence, both frequency & amplitude are the factors responsible for distinction between the sound of siren & whistle.