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प्रश्न
What name is given to sound waves of frequencies higher than 20 kHz ?
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उत्तर
Ultrasonic sound is sound waves of frequencies higher than 20 kHz.
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संबंधित प्रश्न
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Explain the working and application of a sonar.
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Name the three characteristics of sound.
Name the unit used to measure the loudness of sound. Also write its symbol.
Name the characteristic of sound which depends on (a) amplitude (b) frequency, and (c) waveform.
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Write any three applications (or uses) of ultrasound.
Expand the abbreviation of the term SONAR.
