1. Why is sound wave called a longitudinal wave ?
2. Does sound follow the same laws of reflection as light does ? explain !
3. explain how the human ear works
4. How is ultrasound used for cleaning ?
5. what is reverberation? How can it be reduced ?
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Answers
Answer:
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Explanation:
1. sound wave is called as longitudinal wave due to rough and trough motion
2. Yes, sound follows the same laws of reflection as that of light because, (i) Angle of incidence of sound is always equal to that of angle of reflection of sound waves. (ii) The direction in which sound is incident, the direction in which it is reflected and normal all lie in the same plane.
3.The sound waves are gathered by the outer ear and sent down the ear canal to the eardrum. The sound waves cause the eardrum to vibrate, which sets the three tiny bones in the middle ear into motion. The motion of the bones causes the fluid in the inner ear or cochlea to move.
4.Ultrasonic cleaning uses cavitation bubbles induced by high frequency pressure (sound) waves to agitate a liquid. The agitation produces high forces on contaminants adhering to substrates like metals, plastics, glass, rubber, and ceramics. This action also penetrates blind holes, cracks, and recesses.
5.Reverberation happens when time period between Original and Reflected Sound is less than 0.1 seconds. Reverberation can be reduced by using sound absorbing materials. Carpets are put to absorb sound. ... Soundproofing panels are put on walls to absorb sound.
1) Why is sound wave called a longitudinal wave ?
Ans :- Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves
2) Does sound follow the same laws of reflection as light does ? explain !
Ans :-Yes, sound follows the same laws of reflection as light.
3) explain how the human ear works
Ans :-The sound waves are gathered by the outer ear and sent down the ear canal to the eardrum. The sound waves cause the eardrum to vibrate, which sets the three tiny bones in the middle ear into motion. The motion of the bones causes the fluid in the inner ear or cochlea to move.
4) How is ultrasound used for cleaning ?
Ans :-Ultrasonic cleaning uses cavitation bubbles induced by high frequency pressure (sound) waves to agitate a liquid. The agitation produces high forces on contaminants adhering to substrates like metals, plastics, glass, rubber, and ceramics. This action also penetrates blind holes, cracks, and recesses.
5) what is reverberation? How can it be reduced ?
Ans :- Reverberation can be reduced by absorbing the sound using some materials as it reaches the wall and ceiling of the room and thus prevent the sound from getting reflected. Some materials which are used to reduce reverberation are fibreboard, heavy curtains, plastics etc.