10 Answers to Review Questions. “Digital Media Primer” Yue-Ling Wong
Chapter 4
When applicable, please select all correct answers.
1. A sound with higher _____ is perceived to have a higher pitch.
A. volume
B. frequency
C. fidelity
D. sampling rate
E. bit depth
2. The unit used for measuring _____ is Hertz (Hz).
A. amplitude
3. A waveform is a graphical representation of the _____ fluctuations of a sound wave.
A. pressure time
B. space time
C. pressure space
4. The horizontal axis of a waveform is _____.
A. pressure
B. distance
C. time
5. The vertical axis of a waveform is _____.
A. pressure
B. distance
C. time
6. True/False: Zero decibels is when there is absence of sound or no sound wave.
7. The _____ of a sound relates to the sound intensity or loudness.
A. amplitude
B. frequency
C. sampling rate
D. bit depth
E. dynamic range
8. The _____ of a digitized sound affects the accuracy of the sampled amplitudes being stored.
A. amplitude
9. In digital audio, the number of sample points taken per second is called the _____.
A. amplitude
B. frequency
C. sampling rate
D. bit depth
10. In digital audio, higher resolution means higher ______.
A. amplitude
B. frequency
C. sampling rate
D. bit depth
E. dynamic range
11. How many levels of amplitude values does an 8-bit sound allow?
12. How many levels of amplitude values does a 16-bit sound allow?
13. Generally, the audio CD music sampling rate is _____ and bit depth is _____.
15. True/False: MP3 is a good file format to keep as a source file for further editing.
16. Which of the following are audio file formats?
17. According to east _____ points in each sound wave cycle to be able
18. The reduction of a digital audio file size can be achieved by _____.
A. reducing the sampling rate
19. Higher ______ will result in larger file size.
A. amplitude
B. frequency
C. sampling rate
D. bit depth
E. dynamic range
20. Reducing the sampling rate from 44.1 kHz to 22.05 kHz will _____.
A. have no effect on the file size
B. decrease the file size by half
C. decrease the file size to about 1/22th
D. decrease the file size to about 1/44th
21. Reducing the bit depth from 16 bit to 8 bit will _____.
A. have no effect on the file size
22. Reducing the number of channels from two (stereo) to one (mono) will _____.
A. have no effect on the file size
B. decrease the file size by half
12 Answers to Review Questions. “Digital Media Primer” Yue-Ling Wong
C. decrease the file size to 1/5th
D. decrease the file size to 1/10th
23. The MIDI standard specifies the _____.
A. sampling rate for the synthesized sound
B. bit depth for the synthesized sound
C. configurations of cables and cable plugs
D. format of the data