Question 6
Loudness of sound is measured in units of

(a) Decibel (dB)
(b) Hertz (Hz)
(c) Metre (m)
(d) Metre/second (m/s)

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Solution

The answer is (a).
Decibel is the unit of loudness of sound.

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Similar questions

Q. Question 6
Loudness of sound is measured in units of

(a) Decibel (dB)
(b) Hertz (Hz)
(c) Metre (m)
(d) Metre/second (m/s)

Decibel (dB) is a unit of loudness of sound. It is defined in a manner such that when the amplitude of the sound is multiplied by a factor of $\sqrt{10}$ , the decibel level increases by 10 units. Loud music of 70dB is being played at a function. To reduce the loudness to a level of 30dB, the amplitude of the instrument playing music has to be reduced by a factor of:

Q. Statement 1: Unit of loudness is decibel (dB).
Statement 2: Timbre of sound depends on the shape of the waveform.

Q. Question 11
The unit of measurement used for expressing dimension (size) of cells is:

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(b) millimetre
(c) micrometre
(d) metre

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