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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
Name the factor that determines Pitch of the note.
The ratio of the amplitude of two waves is 3 : 4. What is the ratio of their Frequencies?
A person standing between two vertical cliffs and 480 m from the nearest cliff shouts. He hears the first echo after 3s and the second echo 2s later. Calculate:
- The speed of sound.
- The distance of the other cliff from the person
When sound travels in form of a wave
Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.
If the amplitude of a wave is doubled, what will be the effect on its loudness?
Figure shows two jars A and B containing water up to different heights. Which will produce sound of higher pitch when air is blown on them?
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 reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
