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प्रश्न
What is the range of frequencies associated with infrasound?
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उत्तर
Sounds of frequencies below 20 Hz are called infrasonic sounds or infrasound.
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संबंधित प्रश्न
What is the range of frequencies associated with ultrasound?
Fill in the blanks with suitable words.
A sound wave consists of places of higher pressure called ................. and places of................pressure called.................
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.
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 ?
A girl is sitting in the middle of a park of dimension 12 m × 12 m. On the left side of it, there is a building adjoining the park and on the right side of the park, there is a road adjoining the park. A sound is produced on the road by a cracker. Is it possible for the girl to hear the echo of this sound? Explain your answer.
