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प्रश्न
What are ultrasonic?
एका वाक्यात उत्तर
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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
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Which has the higher frequency - ultrasonic sound or infrasonic sound?
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
Name the sound of the frequency given below:
100 Hz
State four practical uses of ultrasonic vibrations.
The sonic boom of an aircraft has a time period of 0.00005s. Calculate the frequency of sound produced.
What does SONAR stand for?
What are infrasonic and ultrasonic sounds?
State the main components of a hearing aid.
1 hertz is equal to
