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प्रश्न
Two waves of the same pitch have their amplitudes in the ratio 2 : 3.
(i) What will be the ratio of their loudness?
(ii) What will be the ratio of their frequencies?
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उत्तर
(i) Given, the Amplitude ratio, a1 : a2 = 2 : 3
∵ I α a2
∴ `"I"_1/"I"_2="a"_1^2/"a"_2^2=2^2/3^2=4/9`
⇒ I1 : I2 = 4 : 9
(ii) ∵ Frequency α Pitch
∴ Ratio of frequencies = 1 : 1
संबंधित प्रश्न
If the amplitude of vibration is large, sound is feeble.
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(a) the pitch of a note.
(b) the loudness of the sound heard.
(c) the quality of the note.
It is observed that during march-past we hear a base drum distinctly from a distance compared to the side drums.
(i) Name the characteristics of sound associated with the above obervation.
(ii) Give a reason for the above observation.
Name musical instrument, one in each case, which produces its notes by using the following. In each case state the method used to produce notes of different pitches and loudness.
(a) A vibrating string.
(b) A vibrating column air.
(c) Vibration of any other body.
Give scientific reason for the following:
When a nail is hammering appears to get higher and higher in pitch.
