1.

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.

Answer»

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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