Metrics related to the frequency spectrum of noise (e.g., critical ratios) are often used to describe and predict auditory masking. In this study, detection thresholds for a 10 kHz tone were measured in the presence of anthropogenic, natural, and synthesized noise. Time-domain and frequency-domain metrics were calculated for the different noise types, and regression models were used to determine the relationship between noise metrics and masked tonal thresholds. Statistical models suggested that detection thresholds, masked by a variety of noise types at a variety of noise levels, can be explained with metrics related to the spectral density of noise and the degree to which amplitude modulation is correlated across frequency regions of the noise. The results demonstrate the need to include time-domain metrics when describing and predicting auditory masking.

1.
American National Standard Institute (ANSI)
(
1994
). “
Acoustical Terminology
,” (
American National Standards Institute
,
New York
), p.
57
.
2.
Au
,
W. W. L.
(
1993
).
The Sonar of Dolphins
(
Springer-Verlag
,
New York
), pp.
1
275
.
3.
Au
,
W. W. L.
, and
Moore
,
P. W. B.
(
1990
). “
Critical ratio and critical bandwidth for the Atlantic bottlenose dolphin
,”
J. Acoust. Soc. Am.
88
,
1635
1638
.
4.
Branstetter
,
B. K.
, and
Finneran
,
J. J.
(
2008
). “
Comodulation masking release in bottlenose dolphins (Tursiops truncatus)
,”
J. Acoust. Soc. Am.
124
,
625
633
.
5.
Branstetter
,
B. K.
,
Trickey
,
J. S.
,
Bakhtiari
,
K.
,
Black
,
A.
,
Aihara
,
H.
, and
Finneran
,
J. J.
(
2013
). “
Auditory masking patterns in bottlenose dolphins (Tursiops truncatus) with natural, anthropogenic, and synthesized noise
,”
J. Acoust. Soc. Am.
133
,
1811
1818
.
6.
Clark
,
C. W.
,
Ellison
,
W. T.
,
Southall
,
B. L.
,
Hatch
,
L.
,
Van Parijs
,
S. M.
,
Frankel
,
A.
, and
Ponirakis
,
D.
(
2009
). “
Acoustic masking in marine ecosystems: Intuitions, analysis, and implication
,”
Mar. Ecol. Prog. Ser.
395
,
201
222
.
7.
Erbe
,
C.
(
2008
). “
Critical ratios of beluga whales (Delphinapterus leucas) and masked signal duration
,”
J. Acoust. Soc. Am.
124
,
2216
2223
.
8.
Erbe
,
C.
, and
Farmer
,
D. M.
(
1998
). “
Masked hearing thresholds of a beluga whale (Delphinapterus leucas) in icebreaker noise
,”
Deep-Sea Res.
45
,
1373
1378
.
9.
Finneran
,
J. J.
,
Schlundt
,
C. E.
,
Carder
,
D. A.
, and
Ridgway
,
S. H.
(
2002
). “
Auditory filter shapes for the bottlenose dolphin (Tursiops truncatus) and the white whale (Delphinapterus leucas) derived with notched noise
,”
J. Acoust. Soc. Am.
112
,
322
328
.
10.
Fletcher
,
H.
(
1940
). “
Auditory patterns
,”
Rev. Mod. Phys.
12
,
47
65
.
11.
Gromping
,
U.
(
2006
). “
Relative importance for linear regression in R: The package relaimpo
,”
J. Stat. Software
17
(
1
),
1
27
.
12.
Hall
,
J. W.
,
Grose
,
J. H.
, and
Haggard
,
M. P.
(
1990
). “
Effects of flanking band proximity, number, and modulation pattern on comodulation masking release
,”
J. Acoust. Soc. Am.
87
,
269
283
.
13.
Hall
,
J. W.
,
Haggard
,
M. P.
, and
Fernandes
,
M. A.
(
1984
). “
Detection in noise by spectro-temporal pattern analysis
,”
J. Acoust. Soc. Am.
76
,
50
56
.
14.
Houser
,
D. S.
, and
Finneran
,
J. J.
(
2006
). “
Variation in the hearing sensitivity of a dolphin population obtained through the use of evoked potential audiometry
,”
J. Acoust. Soc. Am.
120
,
4090
4099
.
15.
Irino
,
T.
, and
Patterson
,
R. D.
(
2001
). “
A compressive gammachirp auditory filter for both physiological and psychophysical data
,”
J. Acoust. Soc. Am.
109
,
2008
2022
.
16.
Janik
,
V. M.
(
2000
). “
Source levels and the estimated active space of bottlenose dolphin (Tursiops truncatus) whistles in the Moray Firth, Scotland
,”
J. Comp. Physiol. A
186
,
673
680
.
17.
Kastelein
,
R. A.
, and
Wensveen
,
P. J.
(
2008
). “
Effect of two levels of masking noise on the hearing threshold of a harbor porpoise (Phocoena phocoena) for a 4.0 kHz signal
,”
Aquat. Mamm.
34
,
420
425
.
18.
Kinsler
,
L. E.
,
Frey
,
A. R.
,
Coppens
,
A. B.
, and
Sanders
,
J. V.
(
1982
).
Fundamentals of Acoustics
(
Wiley
,
New York)
, pp.
1
480
.
19.
Lemonds
,
D. W.
,
Kloepper
,
L. N.
,
Nachtigall
,
P. E.
,
Au
,
W. W. L.
,
Vlachos
,
S. A.
, and
Branstetter
,
B. K.
(
2011
). “
A re-evaluation of auditory filter shape in delphinid odontocetes: Evidence of constant-bandwidth filters
,”
J. Acoust. Soc. Am.
130
,
3107
3114
.
20.
Levitt
,
H.
(
1971
). “
Transformed up-down methods in psyhcoacoustics
,”
J. Acoust. Soc. Am.
49
,
467
477
.
21.
Mann
,
J.
,
Connor
,
R. C.
,
Tyack
,
P. L.
, and
Whitehead
,
H.
(
2000
).
Cetacean Societies: Field Studies of Dolphins and Whales
(
The University of Chicago Press
,
Chicago, IL
), pp.
1
433
.
22.
R Development Core Team (2012). “A language and environment for statistical computing,” R Foundation for Statistical Computing, Vienna, Austria.
23.
Richards
,
V. M.
(
1987
). “
Monaural envelope correlation perception
,”
J. Acoust. Soc. Am.
82
,
1621
1630
.
24.
Thomas
,
J. A.
,
Pawloski
,
J. L.
, and
Au
,
W. W. L.
(
1990
). “
Masked hearing abilities in a false killer whale (Pseudorca crassidens)
,” in
Sensory Abilities of Cetaceans: Laboratory and Field Evidence
, edited by
J. A.
Thomas
and
R. A.
Kastelein
(
Plenum
,
New York
), pp.
395
404
.
25.
Trickey
,
J. S.
,
Branstetter
,
B. B.
, and
Finneran
,
J. J.
(
2011
). “
Auditory masking with environmental, comodulated, and Gaussian noise in bottlenose dolphins (Tursiops truncatus)
,”
J. Acoust. Soc. Am.
128
,
3799
3804
.
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