Question

Solve the following crossword puzzle with the help of clues given below.

Across

1. Speed greater than that of sound
2. Sound produced due to irregular variations in the amplitude is termed as _____.
7. Sounds of frequency above $20, 000 Hz$ are called _____ sounds.
8. Shrillness of sounds is characterised by its _____.
9. Loudness of sounds is proportional to square of its _____.

Down

2. Phenomenon caused by reflection of sound
3. Pitch of a sound depends on its _____.
4. Unit of frequency
5. Sound is produced by. _____ of particles present in objects.

Accepted Answer

Across

1. Speed greater than that of sound is supersonic.
2. Sound produced due to irregular variations in the amplitude is termed as noise.
7. Sounds of frequency above $20, 000 Hz$ are called ultrasonic sounds.
8. Shrillness of sounds is characterised by its pitch.
9. Loudness of sounds is proportional to square of its amplitude.

Down

2. Phenomenon caused by reflection of sound is echo.
3. Pitch of a sound depends on its frequency.
4. Unit of frequency is Hertz.
5. Sound is produced by vibration of particles present in objects.

Important Questions on Sound

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