MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Perception of Sound

The loudness ...

Question

The loudness of a sound is 8 dB when the amplitude of vibrations is 2 units. If the amplitude is increased to 8 units, find the loudness of the sound in dB.

Open in App

Solution

$L o u d n e s s \propto {(A m p l i t u d e)}^{2}$
Here amplitude is increased by 4 times. So, loudness should increase by 16 times.
Therefore, loudness $= 16 \times 8 = 128 d B$

Suggest Corrections

thumbs-up

0

Similar questions

Q. A sound source is producing 2000 waves in 4 seconds. The loudness and amplitude of this sound wave are 10 dB, and 5 units respectively. Find loudness and frequency of the sound wave when the amplitude is increased to 10 units.

Q. The time period, loudness, and amplitude of a sound wave are 4 seconds, 5 dB, and 2 units respectively. Find the loudness and frequency of the sound wave when the amplitude is increased to 10 units and the time period is reduced to half the initial value.

How is the loudness related to the amplitude of sound and in what units it is measured?[3 MARKS]

Q. Question 5
In order to reduce the loudness of a sound we have to

(a) Decrease its frequency of vibration of the sound.
(b) Increase its frequency of vibration of the sound.
(c) Decrease its amplitude of vibration of the sound.
(d) Increase its amplitude of vibration of the sound.

Loudness of a sound is proportional to the square of the amplitude of the vibration producing the sound. Explain

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Perception of Sound

PHYSICS

Watch in App

explore_more_icon

Explore more

Perception of Sound

Standard VIII Physics

Join BYJU'S Learning Program

CrossIcon