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प्रश्न
State three factors on which loundess of sound heard by a listener depends.
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उत्तर
The loudness of the sound heard depends on:
(i) Loudness is proportional to the square of the amplitude.
(ii) Loudness is inversely proportional to the square of distance.
(iii)Loudness depends on the surface area of the vibrating body.
संबंधित प्रश्न
Loudness is determined by the __________ of vibration.
Smaller the membrane, .................. is the pitch.
Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.
Define the following term:
Frequency
Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.
How is the pitch of sound in a guitar changed if (a) thin wire is used, (b) wire under less tension is used?
The diagram below shows three ways in which the string of an instrument can vibrate.
(i) Which of the above diagrams shows the fundamental note?
(ii) Which has the frequency 4 times that of the fundamental?
(iii) State the ratio between the frequency of the first and second.
Give scientific reasons.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
