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प्रश्न
How is sound perceived by us?
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उत्तर
Sound requires a material medium for its propagation. It is produced when a body vibrates. The vibrations produced at a point are transmitted in the medium (air) from one point to the next and so on in the form of mechanical waves which produce compressions and rarefactions in air. These compressions and rarefactions produce vibrations in the eardrum which are perceived by us as sound.
संबंधित प्रश्न
Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium.
Differentiate between a high pitch sound and a low pitch sound.
Give two examples each of longitudinal waves and transverse waves.
Complete the following sentences :
Wave velocity = ________________ × wavelength.
A cannon is fired at A (see diagram). An observer at B hears two sounds. The first sound is heard after 1 second and the second 3s after the observer sees the flash. (Velocity of sound = 340 ms−1)
(i) Why does the observer see the flash before he hears the sound?
(ii) Calculate the distance x between the observer and the wall.
Sound is generated by the rhythmic ______ of an object.
Select the correct option:
Which of the following is an elastic wave?
How does the speed of sound depend on (i) Amplitude, and (ii) Wavelength?
Why is a sound wave called a longitudinal wave?
Find the odd one out.
