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.
A string is streched over two rigid supports and a weight of 1 kgwt is suspended from one of its free ends and then it is plucked. If the length of string over two rigid supports is decreased and plucked again, then the frequency of sound produced ______________________ | |||
| Right Option : B | |||
| View Explanation | |||
Vibrating bodies produce _________ . | |||
| Right Option : A | |||
| View Explanation | |||
Assetion (A) : Different musical sounds are produced from percussion instruments by exciting the stretched membrane at different tensions. Reason (R) : Flute, bassoon, oboes are example of drum instruments. | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
Abhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
Sharandeep Singh
7thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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Archit Segal
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Eshan Arora
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Om Umang
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Aman Kumar Shrivastava
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
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7thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
