![]() ![]() A pendulum oscillates \ times in \ seconds. Į) Shrillness of a sound is determined by the _ of vibration.Īns: Shrillness of a sound is determined by the frequency of vibration.ĥ. ī) Loudness is determined by the _ of vibration.Īns: Loudness is determined by the amplitude of vibration.Īns: The unit of frequency is hertz (Hz). Fill in the blanks with suitable words.Ī) Time taken by an object to complete one oscillation is called _.Īns: Time taken by an object to complete one oscillation is called time period. If one is subjected to loud unpleasant sound continuously for a long time, then it may cause temporary hearing impairment.Ĥ. G) Noise pollution may cause partial hearing impairment. Unwanted or unpleasant sounds are known as noise. As the frequency of vibration increases, the pitch of the sound also increases and vice versa.į) Unwanted or unpleasant sound is termed as music. The pitch of a sound is proportional to its frequency. The number of oscillations per second of a vibrating object is known as its frequency.Ĭ) If the amplitude of vibration is large, sound is feeble.ĭ) For human ears, the audible range is \ Hz to \ Hz.įor human ears, the audible range is \ Hz to \ Hz.Į) The lower the frequency of vibration, the higher is the pitch. Therefore, sound cannot travel through a vacuum where there is no molecule or atom to induce vibrations.ī) The number of oscillations per second of a vibrating object is called its time period. Vacuum is an enclosed place in which there are no molecules or matter. In the following statements, tick ‘T’ against those which are true, and ‘F’ against those which are false. ![]() Which of the following voices is likely to have minimum frequency?įrequency of a sound is directly proportional to pitch. ![]()
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