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प्रश्न
Does SONAR make use of infrasonic sound?
उत्तर
No, SONAR does not make use of infrasonic waves. Instead, it make use of ultrasonic waves.
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
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| I | II |
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| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
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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 |
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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.
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
Complete the following sentence:
Bats can produce and hear ___________ sound.
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 are ultrasonic? State and explain two applications of ultrasounds.
What are hearing aids?
Bats produce ______ sound during screaming.
