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प्रश्न
What do you understand by the term ultrasonic vibrations?
एका वाक्यात 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:
Infrasonic sound is of frequency ______________.
Name the sound of the frequency given below:
1000 Hz
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State two applications of ultrasound.
Name three animals which can hear ultrasonic vibrations.
What are ultrasonic?
What are ultrasonic? State and explain two applications of ultrasounds.
What are hearing aids?
1 hertz is equal to
