Sound Grade 8

Q-1 Sound can travel FASTEST through

• Gases

• Liquid

• solid

• none of the above

Voice of which of the following is likely to have minimum frequency?

• Man

• Woman

• Baby (Boy)

• Baby (Girl)

Sounds having frequency less than 20 Hz are called-

• Infrasonic

• Ultrasonic

• Supersonic

• all of the above

A tuning fork of frequency 384 Hz produces a lower note than one of frequency-

• 856Hz

• 329Hz

• 486Hz

• 512Hz

True or False- For human ears, the audible range is 20 Hz to 20,000 Hz.

• True

• false

Unwanted or unpleasant sound is termed as music.

• True

• False

Unwanted sound is called ……………….. .

1 hertz is equal to-

• 30 vibrations per minute

• 1 vibration per minute

• 60 vibrations per minute.