Sound

Page
3

forced vibration.

resonance.

refraction.

diffraction.

Slide 26

A factory floor vibrates, and as a result you vibrate when standing on the floor. This is

forced vibration.

resonance.

refraction.

diffraction.

Slide 27

When you tap various objects, they produce characteristic sounds that are related to

wavelength.

amplitude.

period.

natural frequency.

Slide 28

When you tap various objects, they produce characteristic sounds that are related to

wavelength.

amplitude.

period.

natural frequency.

Slide 29

When the surface of a guitar is made to vibrate, we say it undergoes

forced vibration.

resonance.

refraction.

amplitude enhancement.

Slide 30

When the surface of a guitar is made to vibrate, we say it undergoes

forced vibration.

resonance.

refraction.

amplitude enhancement.

Comment: The sound may be enhanced, but it is the surface of the guitar that undergoes forced vibration.

Slide 31

When an object is set vibrating by a wave having a frequency that matches the natural frequency of the object, what occurs is

forced vibration.

resonance.

refraction.

amplitude enhancement.

Slide 32

When an object is set vibrating by a wave having a frequency that matches the natural frequency of the object, what occurs is

forced vibration.

resonance.

refraction.

amplitude enhancement.

Comment: Resonance, rather than amplitude enhancement, is the better answer.

Slide 33

Noise-canceling devices such as jackhammer earphones make use of sound

destruction.

interference.

resonance.

amplification.

Slide 34

Noise-canceling devices such as jackhammer earphones make use of sound

destruction.

interference.

resonance.

amplification.

Slide 35

The phenomenon of beats is the result of sound

destruction.

interference.

resonance.

amplification.

Slide 36