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प्रश्न
What are ultrasonic?
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उत्तर
Ultrasonic are sounds having frequency higher that 20 KHz and not audible to the human being.
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संबंधित प्रश्न
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Name the sound of the frequency given below:
10 Hz
Can you hear the sound produced due to vibrations of a seconds pendulum? Give reasons.
Explain how do bats locate the obstacles and prey in their way.
What do you understand by the term infrasonic vibrations?
What do you understand by the term ultrasonic vibrations?
What are ultrasonic? State and explain two applications of ultrasounds.
What are hearing aids?
State the properties of ultrasound that make it useful.
Bats produce ______ sound during screaming.
