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प्रश्न
What does SONAR stand for? Where do we make use of SONAR?
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उत्तर
SONAR stands for Sound Navigation and Ranging. Sonar helps the oceanographers and ship captains to determine the depth of the ocean.
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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.
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
What is ultrasound?
State the approximate speed of ultrasound in air.
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
What do you understand by the term ultrasonic vibrations?
Name three animals which can hear ultrasonic vibrations.
1 hertz is equal to
Bats produce ______ sound during screaming.
The range of audible frequency for the human ear is
