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प्रश्न
What do you understand by the term ultrasonic vibrations?
एक पंक्ति में उत्तर
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उत्तर
Those vibrations, whose frequency is more than 20000 hertz and are not perceived by human ear, are known as ultrasonic vibrations.
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संबंधित प्रश्न
Complete the following sentence:
Ultrasound is of frequency ___________.
Complete the following sentence:
Infrasonic sound is of frequency ______________.
Complete the following sentence:
Elephants produce ____________sound.
State two applications of ultrasound.
Sonar makes use of :
How do bats locate their prey during a flight?
Does SONAR make use of infrasonic sound?
What are infrasonic and ultrasonic sounds?
What are hearing aids?
1 hertz is equal to
