Sound is produced by Vibrations
Sound is produced by Vibrations
Sound: We think of the word ‘sound’ whenever we have a sense of hearing in our ears. We, therefore, say that sound is a form of energy which produces the sensation of hearing in our ears. The sound can be produced by striking, shaking, blowing, rubbing or plucking, different objects. A close look at these situations shows that we actually set one or another objects, into vibrations. It is these vibrations that produce sound. Whenever a source produces a sound, there are always some vibrations linked with it. We can, therefore think of vibrations as the basic cause of all sounds.`Vibration: The to and fro or back and forth motion of an object is called vibration.
How sound is produced: A sound is produced because of a vibration. Thus, sound is a vibration that is capable of being heard. The organ in human beings that is involved in the production of sound is the larynx (commonly called the voice box). The voice box is situated in the neck at the upper end of wind pipe. The sound produced is controlled by vocal cords, which are thin membranes stretched across the voice box. There are muscles attached to the vocal cords. These muscles can vary the tension in the vocal cords (i.e., make them tight or loose). With the help of these muscles, we can make different sounds.The vocal cord in men are about 20 mm long and in women they are 15 mm long.
Which of the following statements are correct ? (i) Sound is produce by vibrations. (ii) Sound reqires a medium for propagation. (iii) Light and sound both require a medium for propagation. (iv) Sound travels slower than light. | |||
| Right Option : D | |||
| View Explanation | |||
In ordinary talk, the amplitude of vibration is aproximately | |||
| Right Option : C | |||
| View Explanation | |||
The maximum possible displacement of a vibrating body from its mean position during its motion is equal to ____________ | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
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Cheshta
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Archit Segal
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Om Umang
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