Chapter 20: Sound

56 Questions | By Drtaylor | Last updated: Mar 18, 2022 | Total Attempts: 1370

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1.

The source of every sound is something that is
- A.
  
  Vibrating.
- B.
  
  Moving.
- C.
  
  Accelerating.
- D.
  
  Undergoing simple harmonic motion.
- E.
  
  A net emitter of energy.
2.

A sound source of high frequency emits a high
- A.
  
  Speed.
- B.
  
  Amplitude.
- C.
  
  Pitch.
- D.
  
  All of these
- E.
  
  None of these
3.

Double the frequency of a sound and you halve its
- A.
  
  Wavelength.
- B.
  
  Speed.
- C.
  
  Amplitude.
- D.
  
  All of these
- E.
  
  None of these
4.

Double the frequency of sound and you also double its
- A.
  
  Wavelength.
- B.
  
  Speed.
- C.
  
  Amplitude.
- D.
  
  All of these
- E.
  
  None of these
5.

The approximate range of human hearing is
- A.
  
  10 hertz to 10,000 hertz.
- B.
  
  20 hertz to 20,000 hertz.
- C.
  
  40 hertz to 40,000 hertz.
- D.
  
  Actually all of these – depends on the hearing ability of the person.
6.

We are best at hearing
- A.
  
  Infrasonic sound.
- B.
  
  Ultrasonic sound.
- C.
  
  Both infrasonic and ultrasonic sounds.
- D.
  
  None of the above choices are true.
7.

A sound wave is a
- A.
  
  Longitudinal wave.
- B.
  
  Transverse wave.
- C.
  
  Standing wave.
- D.
  
  Shock wave.
- E.
  
  None of the above choices are correct.
8.

Compressions and rarefactions are characteristic of
- A.
  
  Longitudinal waves.
- B.
  
  Transverse waves.
- C.
  
  Both longitudinal and transverse waves.
- D.
  
  None of the above.
9.

Compressions and rarefactions normally travel in
- A.
  
  The same direction in a wave.
- B.
  
  Opposite directions in a wave.
- C.
  
  Directions that are at right angles to the wave direction.
10.

Sound travels faster in
- A.
  
  Air.
- B.
  
  Water.
- C.
  
  Steel.
- D.
  
  A vacuum.
- E.
  
  Sound travels at about the same speed in all of the above media.
11.

Sound waves cannot travel in
- A.
  
  Air.
- B.
  
  Water.
- C.
  
  Steel.
- D.
  
  A vacuum.
- E.
  
  Any of the above media
12.

The speed of a sound wave in air depends on
- A.
  
  Its frequency.
- B.
  
  Its wavelength.
- C.
  
  The air temperature.
- D.
  
  All of the above choices are correct.
- E.
  
  None of the above choices are correct.
13.

Sound travels faster in air if the air temperature is
- A.
  
  Warm.
- B.
  
  Cold.
- C.
  
  Average.
14.

A wave having a frequency of 1000 hertz vibrates at
- A.
  
  Less than 1000 cycles per second.
- B.
  
  1000 cycles per second.
- C.
  
  More than 1000 cycles per second.
15.

Reverberation is actually a case of
- A.
  
  Sound interference.
- B.
  
  Forced vibrations.
- C.
  
  Re-echoed sound.
- D.
  
  Resonance.
- E.
  
  None of the above
16.

The explanation for refraction must involve a change in
- A.
  
  Frequency.
- B.
  
  Wavelength.
- C.
  
  Speed.
- D.
  
  All of the above choices are true.
- E.
  
  None of the above choices are true.
17.

When the speed of sound near the ground is greater than it is at higher altitudes, the sound tends to be bent
- A.
  
  Upward.
- B.
  
  Downward.
- C.
  
  To the left.
- D.
  
  To the right.
- E.
  
  None of the above choices are correct.
18.

Refraction of sound can occur in
- A.
  
  Air.
- B.
  
  Water.
- C.
  
  Both air and water.
- D.
  
  Neither air nor water.
19.

A dolphin perceives its environment by the sense of
- A.
  
  Sight.
- B.
  
  Sound.
- C.
  
  Both sight and sound.
- D.
  
  Neither sight nor sound.
20.

In perceiving its environment, a dolphin makes use of
- A.
  
  Echoes.
- B.
  
  The Doppler effect.
- C.
  
  Ultrasound.
- D.
  
  All of the above choices are correct.
- E.
  
  None of the above choices are correct.
21.

The energy of sound in air eventually becomes
- A.
  
  Increased internal energy of the air.
- B.
  
  Weaker and weaker until it disappears.
- C.
  
  Cancelled by destructive interference.
- D.
  
  Cancelled by both destructive and constructive interference.
22.

The frequencies of sound that carry farther in air are
- A.
  
  Low.
- B.
  
  High.
- C.
  
  Ultrasonic.
23.

The wavelengths of sound that carry farther in air are relatively
- A.
  
  Long.
- B.
  
  Short.
- C.
  
  Ultrasonic.
24.

Sound will be louder if a struck tuning fork is held
- A.
  
  In the air.
- B.
  
  With its base against a table top.
- C.
  
  With its prongs in shallow water.
- D.
  
  In your closed fist.
25.

A base fiddle is louder than a harp because of its
- A.
  
  Thicker strings.
- B.
  
  Sounding board.
- C.
  
  Lower pitch.
- D.
  
  All of the above are true.
- E.
  
  None of the above are true.