Frequencies higher than the human audible limit of 20,000 Hz are classified as _____.
Ultrasound
The normal range of human hearing lies between about 20 Hz and 20,000 Hz.
Sound waves with frequencies above the upper audible limit of 20,000 Hz are called ultrasound and cannot be heard by the human ear.
Infrasound refers to frequencies below 20 Hz, while the term supersonic describes speeds greater than the speed of sound rather than a frequency of sound.
Hence, frequencies higher than 20,000 Hz are classified as Ultrasound.
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Important Questions from Wave
Which of the following is correct?
I. Sound is a mechanical wave
II. Sound wave does not need any medium to propagate
At a particular temperature, sound propagates in ______ at the fastest speed .
The atmospheric green house effect is produced mainly by the absorption and re-emission of:
Which of the following are examples of electromagnetic waves?
a. Television waves
b. Ultraviolet rays
c. X-rays
d. Sun rays
When light passes from one medium into another medium, then the physical property which does not change is
