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प्रश्न
What is ultrasound?
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उत्तर
Sounds of frequency above 20 kHz are called ultrasound.
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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.
Which has the higher frequency - ultrasonic sound or infrasonic sound?
Complete the following sentence:
Bats can produce and hear ___________ sound.
Name the sound of the frequency given below:
40 kHz
State the approximate speed of ultrasound in air.
Explain how do bats locate the obstacles and prey in their way.
The properties of ultrasound that make it useful are
What are ultrasonic?
Does SONAR make use of infrasonic sound?
What does SONAR stand for? Where do we make use of SONAR?
