Fill in the following blanks with suitable words:

(a) Sounds are produced by _objects.

(b) The human voice box is called_

(c) Sound cannot travel in_

(d) A set of three _tiny in the middle part of ear passes on sound vibrations from the eardrum to the liquid in cochlea.

(e) The unit of frequency is_

(f) The timet taken by an object to complete one oscillation is called _

(g) The shrillness of a sound is determined by the_ of vibration.

(h) Unpleasant sound is called_

(i) Sound which is pleasing to the era is called_ sound

(j) A person having partial hearing loss can hear properly by wearing a device called hearing_ on the ear.

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Solution

(a) vibrating (b) larynx (c) vacuum (d) bones (e) hertz (Hz) (f) time-period (g) frequency (h) noise (i) musical (j) aid

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Similar questions

Fill in the blanks with suitable words.

(a) Time taken by an object to complete one oscillation is called _________.

(b) Loudness is determined by the ________ of vibration.

(d) Unwanted sound is called _________.

(e) Shrillness of a sound is determined by the _________ of vibration.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

State whether the following statements are true or false:

(a) Sound cannot travel in vacuum.

(b) The number of oscillations per second of a vibrating object is called its time-period.

(d) The lower the frequency of vibration, the higher is the pitch.

(e) If the amplitude of vibrations is doubled, the loudness of sound also gets doubled.

(f) When the amplitude of vibrations is halved, the loudness of sound becomes one-fourth.

(g) Unwanted or unpleasant sound is termed as music.

(h) Noise pollution may cause partial hearing impairment.

Fill in the following blanks with suitable words :

(a) Sound is caused by ______.

(b) A sound wave consists of places of higher pressure called ______ and places of ______ pressure called ______ .

(d) Sound cannot travel through ______ .

(e) The speed of sound in a solid is ______ than the speed of sound in air.

(f) When the frequency of the sound is increased, the wavelength ______ .

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