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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?
What is the range of frequencies associated with infrasound?
What name is given to the sound waves of frequency too low for humans to hear ?
What type of sound waves are produced by a vibrating simple pendulum ?
Choose the infrasonic waves and ultrasonic waves from the following frequencies :
(i) 10,000 Hz
(ii) 30,000 Hz
(iii) 18 Hz
(iv) 50,000 Hz
(v) 10 Hz
What is ultrasound ? What is the difference between ordinary sound and ultrasound ?
What are infrasonic waves ? Name two animals which produce infrasonic 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)
Which of the above two graphs (a) and (b) (Fig.12.3) representing the human voice is likely to be the male voice? Give a reason for your answer.
For hearing the loudest ticking sound heard by the ear, find the angle x in Fig.12.4.
