Question
Download Solution PDFThe frequency of ultrasonic waves is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFrequency: The number of waves that pass through a fixed point in unit time.
The unit of frequency is Hertz (Hz).
Ultrasonic waves: The waves which have frequency more than 18-20 kHz.
Properties of ultrasonic waves:
- They can not travel through a vacuum.
- They can travel with the speed of sound in a given medium.
- They are used for welding also.
- They can reflect and refract like light rays.
- These waves are used in engineering, medical treatment, etc.
|
Subsonic Waves |
Frequency less than 20 Hz |
|
Sonic Waves |
Frequency between 20 Hz to 20 kHz |
|
Ultrasonic Waves |
Frequency more than 20 kHz |
Additional Information
Infrasonic sound:
- It has a frequency of less than 20 Hz and these are generally produced by sources of a bigger size such as earthquakes, volcanic eruptions, etc.
- Sound waves with frequencies below the audible range are called infrasonic.
Audible sound:
- It has a frequency of 20-20000 Hz since these are sensitive to the human ears
- If the frequency is greater or less then audible frequency, the human ear won't be able to sense it
Ultrasonic sound:
It has a frequency greater than 20000 Hz and certain creatures such as dog, cat, a bat can hear this kind of sound.
Ultrasounds are high-frequency waves. Ultrasounds can travel along well-defined paths even in the presence of obstacles.
Last updated on Jun 19, 2025
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