1. Which phenomenon does NOT result from the
algebraic addition of sound pressure functions as expressed
by the Law of Superposition?
A. beats
|
B.
interference
|
C. phasing
|
D. masking
|
2.
Destructive interference between two waves of the same
frequency is at its greatest when the phase difference
between them is _________.
A. 0°
|
B. 90°
|
C. 180°
|
D. 360°
|
3. Which phenomenon is NOT the result of
interference effects?
A.
diffraction
|
B.
beats |
C. dead
spots
|
D.
ground effect
|
4. Beats occur between two waves
of similar but not identical _________ and are heard
as periodic changes of ________.
First
blank
|
A.
amplitude
|
B.
waveform |
C.
intensity
|
D.
frequency
|
Second
blank
|
A.
loudness
|
B.
pitch
|
C.
waveform |
D. phase
shifts |
5. Which
two phenomena are examples of amplitude modulation:
_______ and __________.
A.
first-order beats
|
B.
second-order beats
|
C. tremolo
|
D. phasing
|
6. The beat frequency between two tones of
frequency X and Y which are close together is
___________.
A. X + Y
|
B. X - Y
|
C. 2X - Y
|
D. 3X - 2Y
|
7. The perceived pitch of two tones with
frequency X and Y which beat together corresponds to the
frequency ___________.
A. X
|
B. Y
|
C. X - Y
|
D. (X + Y)/2
|
8. Which phenomenon does NOT involve time delays
between the two or more sounds involved?
A. phasing
|
B. beats
|
C. echo
|
D. binaural
hearing
|
9. Frequencies which cancel during phasing are
the even-numbered harmonics of the frequency whose period is
twice the time delay involved. T or F
10. The spectral change caused by phasing is
similar to that of a _______ filter.
A.
bandpass
|
B.
low-pass
|
C.
high-pass
|
D. comb
|
11. Environmental phasing is heard as a dynamic change of
________.
A. loudness
|
B. pitch
|
C. timbre
|
D. envelope
|
12. The
level of masking can be defined in dB as the threshold shift
necessary to restore a masked sound to audibility. T or F
13.
Masking is greatest when two sounds have their energy
lying within the same critical band. T or F
14.
Critical bandwidth can be measured through sine tone
masking experimens with narrow-band noise. T or F
15.
Two sine tones sound with maximum roughness between
them when separated by __________.
A. a
semitone
|
B. a
critical bandwidth
|
C. 1/4
a critical bandwidth
|
D. the
jnd for frequency
|
16.
Two sine tones sound with maximum consonance when
separated by __________.
A. a
semitone
|
B. a
critical bandwidth
|
C. 1/4
a critical bandwidth
|
D. the
jnd for frequency
|
17. Combination
tones appear because of ___________ processing by the
auditory system.
A.
linear
|
B.
non-linear
|
C.
logarithmic
|
D.
exponential
|
18. Which
phenomenon
does not enhance the sound of a musical
ensemble such as an orchestra?
A.
reverberation
|
B.
echo
|
C.
choral effect
|
D.
blend
|
19. Tones
that are widely separated in pitch and repeat more
than 5 tones/second, will be perceived as segregated,
a phenomenon also known as _________.
A.
fusion
|
B.
fission
|
C.
precedence effect
|
D.
blend
|
20. The connection of the two auditory
nerves from each ear to the hemispheres of the brain
can be described as _________.
A.
100% ipsilateral
|
B.
100% contralateral
|
C.
60/40% contralateral
|
D.
50/50% contralateral
|
Index
home