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प्रश्न
What is the difference between infrasonic waves and ultrasonic waves ?
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उत्तर
Difference between infrasonic and ultrasonic waves
| Infrasonic waves | Ultrasonic waves |
| These waves have frequencies below 20Hz. | These waves have frequencies above 20 kHz. |
| They are produced by objects vibrating very slowly. | They are produced by objects vibrating very rapidly. |
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संबंधित प्रश्न
What is the audible range of the average human ear?
Name the organs of hearing in our body.
Can we hear (a) infrasonic waves (b) ultrasonic waves ?
What name is given to the sound waves of frequency too high for humans to hear ?
What is the frequency range of hearing in humans ?
What are infrasonic waves ? Name two animals which produce infrasonic waves.
What are ultrasonic waves ? Name two animals which can produce ultrasonic waves.
The audible range of frequencies of an average human ear is from 20 Hz to 20 kHz. Calculate the corresponding wavelengths. (Speed of sound in air is 344 ms–1)
Three different vibrating objects produce three-types of sounds X, Y and Z. Sounds X and Y cannot be heard by a man having normal range of hearing but sound Z can be heard easily. The sound X is used in hospitals to break kidney stones of a patient into fine grains which then get flushed out with urine. The sound Y is similar to that which is produced during an earthquake before the main shock wave is generated.
(a) What type of sounds are (i) X (ii) Y, and (iii) Z ?
(b) Name one device which can produce sound like X.
(c) Name one device in a science laboratory which can produce sound like Y.
(d) Name one device in our homes which can produce sound like Z.
(e) What is the frequency range of sounds like Z ?
One of the following can hear infrasound. This one is :
