1. Geometric spreading of a sound wave is independent of frequency. T or F

2. The movement of sound waves through a medium is termed _________ , whereas the transfer of energy from the source to the medium is termed __________.

First blank	A. acoustic radiation	B. sound propagation	C. transduction	D. diffusion
Second blank	A. acoustic radiation	B. sound propagation	C. transduction	D. diffusion

3. The speed of sound in a medium decreases as temperature decreases. T or F

4. The speed of sound in air is approximately ____________.

A. 100 ft/sec

B. 330 ft/sec

C. 1100 ft/sec

D. 3300 ft/sec

5. The speed of sound is faster in both water and steel than in air. T or F

6. A resonance curve is usually characterized by a flat response. T or F

7. When the frequency of a stimulus approaches a resonant frequency of an instrument or circuit, the gain of the system will be ________.

A. zero

B. equal to 1

C. at a maximum

D. at a minimum

8. Coupling a vibrating object to a resonator can be said to provide a better match of acoustic impedances, and therefore guarantees a more efficient energy transfer from the source to the air. T or F

9. The frequency response of the auditory system for different intensities is measured and shown as the _________.

A. threshold of hearing

B. equal loudness contours

C. critical bandwidth

D. jnd for frequency

10. The differential threshold for frequency is also called the __________.

A. critical bandwidth

B. masking threshold

C. threshold of hearing

D. jnd for frequency

11. Which is NOT a transducer?

A. amplifier

B. microphone

C. loudspeaker

D. the ear

12. Which does NOT describe a possible response pattern of an electroacoustic device?

A. omnidirectional

B. linear

C. flat

D. presence

13. Sound can reach the inner ear via the bones of the head. T or F

14. When undamped piano strings begin to vibrate spontaneously, for example when someone shouts, sings or claps nearby,  the phenomenon is called __________ .

A. a forced oscillation

B. simple harmonic motion

C. reverberation

D. sympathetic vibration

15. A well designed acoustic radiator avoids sound energy being lost by being reflected back on itself. T or F

16. In radio transmission, the electromagnetic ___________ is modulated by a _________ in the audio range.

First blank	A. program signal	B. spectrum	C. carrier wave	D. sideband
Second blank	A. program signal	B. spectrum	C. carrier wave	D. sideband

17. Which is NOT a standard sampling rate for digital audio?

A. 44 kHz

B. 44.1 kHz

C. 48 kHz

D. 96 kHz

18. The maximum bandwidth, and hence the highest frequency, that can be represented by digital audio with a sampling rate of SR is _________.

A. the same as the sampling rate

B. 1/2 the sampling rate

C. 2 x the sampling rate

D. none of the above

19. The maximum dynamic level in a digital audio signal is determined by the ___________ .

A. the sampling rate

B. bandwidth

C. the number of binary bits

D. binary numbers

20. Which is NOT a type of distortion in a digital audio signal?

A. foldover or aliasing

B. peak clipping

C. quantization

D. none of the above

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