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A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?
The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
Write true or false for a given statement.
The frequency is measured in hertz.
Write true or false for a given statement.
A ticking clock sound is heard late when heard through a metal.
Complete the following sentences :
Sound cannot travel through __________, but it requires a ___________.
What do you mean by the audible range of frequency?
Match the pairs.
| Group ‘A’ | Group ‘B’ |
| (a) Flute | (1) Frequency less than 20 Hz |
| (b) Frequency | (2) Frequency more than 20000 Hz |
| (c) Sound level | (3) Vibrations in the air |
| (d) Ultrasonic sound | (4) Measured in Hz |
| (e) Infrasonic sound | (5) Decibel |
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
The elastic property of medium is a factor of ______ medium.
