IS_Section Quiz_10.3_e

The number of vibrations per second made by a vibrating object is called frequency.

• True

• False

Sound must travel through a medium.

• True

• False

The eardrum amplifies sound vibrations.

• True

• False

The unit of sound level is hertz (Hz).

• True

• False

Exposure to loud noise even for a short period of time can cause hearing loss.

• True

• False

The slower an object vibrates, the lower the frequency of the sound it produces.

• True

• False

The higher the sound frequency, the louder the sound.

• True

• False

The ear bones are located in the inner ear.

• True

• False

The sound levels can be measured by a decibel meter.

• True

• False

Which of following statements about audible frequency range is/are INCORRECT?

(1) Different people have different audible frequency ranges.

(2) The audible frequency range of humans is from about 200 Hz to 20 000 Hz.

(3) The upper limit of hearing is usually higher in older people than that in young people

• A. (1) only

• B. (3) only

• C. (1) and (2) only

• D. (2) and (3) only