Certain sounds, for example, the squeal of chalk on a blackboard, are typically perceived as highly unpleasant. This study addressed the question of what aspects of the auditory representation of such sounds are associated with judgments of unpleasantness. Participants rated the perceived unpleasantness of a large number of sounds that included “griding” and other unpleasant sounds. A multivariate partial least-squares (PLS) model was then built to relate the ratings of unpleasantness with an auditory representation derived from a model of processing in the auditory pathway. The “existence region” of unpleasantness in the auditory space of frequency-temporal modulation was determined after the PLS model had been validated by predicting the unpleasantness of novel sounds from the auditory representation. It was observed that the existence region corresponded to spectral frequencies between 2500 and 5500 Hz, and temporal modulations in the range 1–16 Hz.

1.
Bailey
,
P. J.
,
Chisholm
,
M.
,
Wilkins
,
A.
, and
Hill
,
N. I.
(
2003
). “
Factors affecting the aversive nature of some auditory and visual patterns
,”
Int. J. Audiol.
 
42
,
375
.
2.
Carlyon
,
R. P.
, and
Shamma
,
S. A.
(
2003
). “
An account of monaural phase sensitivity
,”
J. Acoust. Soc. Am.
 
114
,
333
–
348
.
3.
Depireux
,
D. A.
,
Simon
,
J. Z.
,
Klein
,
D. J.
, and
Shamma
,
S. A.
(
2001
). “
Spectro-temporal response field characterization with dynamic ripples in ferret primary auditory cortex
,”
J. Neurophysiol.
 
85
,
1220
–
1234
.
4.
Doron
,
N. N.
, and
LeDoux
,
J. E.
(
1999
). “
Organization of projections to the lateral amygdala from auditory and visual areas of the thalamus in the rat
,”
J. Comp. Neurol.
 
412
,
383
–
409
.
5.
Elhilali
,
M.
,
Chi
,
T.
, and
Shamma
,
S. A.
(
2003
). “
A spectro-temporal modulation index (STMI) for assessment of speech intelligibility
,”
Speech Commun.
 
41
,
331
–
348
.
6.
Fernandez
,
D.
, and
Wilkins
,
A. J.
(
2008
). “
Uncomfortable images in art and nature
,”
Perception
 
37
(
7
),
1098
–
1113
.
7.
Fletcher
,
H.
, and
Munson
,
W. A.
(
1933
). “
Loudness, its definition, measurement and calculation
,”
J. Acoust. Soc. Am.
 
5
,
82
–
108
.
8.
Geladi
,
P.
, and
Kowalski
,
B. R.
(
1986
). “
Partial least-squares regression: A tutorial
,”
Anal. Chim. Acta
 
185
,
1
–
17
.
9.
Halpern
,
L. D.
,
Blake
,
R.
, and
Hillenbrand
,
J.
(
1986
). “
Psychoacoustics of a chilling sound
,”
Percept. Psychophys.
 
39
,
77
–
80
.
10.
Jackson
,
J. E.
(
1991
).
A User’s Guide to Principal Components
(
Wiley
,
New York
).
11.
Jarrell
,
T. W.
,
Gentile
,
C. G.
,
McCabe
,
P. M.
, and
Schneiderman
,
N.
(
1987
). “
Involvement of cortical and thalamic auditory regions in retention of differential bradycardiac conditioning to acoustic conditioned stimuli in rabbits
,”
Brain Res.
 
412
,
285
–
294
.
12.
Kowalski
,
N.
,
Depireux
,
D.
, and
Shamma
,
S.
(
1996
). “
Analysis of dynamic spectra in ferret primary auditory cortex: Characteristics of single unit responses to moving ripple spectra
,”
J. Neurophysiol.
 
76
,
3503
–
3523
.
13.
Mardia
,
K. V.
,
Kent
,
J. T.
, and
Bibby
,
J. M.
(
1979
).
Multivariate Analysis
(
Academic
,
London
).
14.
Meddis
,
R.
, and
O’Mard
,
L.
(
1997
). “
A unitary model of pitch perception
,”
J. Acoust. Soc. Am.
 
102
,
1811
–
1820
.
15.
Mesgarani
,
N.
,
Slaney
,
M.
, and
Shamma
,
S. A.
(
2004
). “
Speech discrimination based on multiscale spectrotemporal modulations
,”
International Conference on Acoustics, Speech and Signal Processing (ICASSP)
, pp.
601
–
604
.
16.
Mesgarani
,
N.
, and
Shamma
,
S. A.
(
2005
). “
Speech enhancement based on the filtering of spectro-temporal modulations
,”
International Conference on Acoustics, Speech and Signal Processing (ICASSP)
, pp.
1105
–
1108
.
17.
Mirz
,
F.
,
Gjedde
,
A.
,
Sodkilde-Jrgensen
,
H.
, and
Pederson
,
C. B.
(
2000
). “
Functional brain imaging of tinnitus-like perception induced by aversive auditory stimuli
,”
NeuroReport
 
11
,
633
–
637
.
18.
Morris
,
J. S.
,
Buchel
,
C.
, and
Dolan
,
R. J.
(
2001
). “
Parallel neural responses in amygdala subregions and sensory cortex during implicit fear conditioning
,”
Neuroimage
 
13
,
1044
–
1052
.
19.
Patterson
,
R. D.
(
2000
). “
Auditory images: How complex sounds are represented in the auditory system
,”
J. Acoust. Soc. Jpn. (E)
 
21
,
183
–
190
.
20.
Patterson
,
R. D.
,
Allerhand
,
M. H.
, and
Giguere
,
C.
(
1995
). “
Time-domain modelling of peripheral auditory processing: A modular architecture and a software platform
,”
J. Acoust. Soc. Am.
 
98
,
1890
–
1894
.
21.
Rhode
,
W. S.
, and
Greenberg
,
S. R.
(
1994
). “
Lateral suppression and inhibition in the cochlear nucleus of the cat
,”
J. Neurophysiol.
 
71
,
493
–
519
.
22.
Shamma
,
S. A.
,
Versnel
,
H.
, and
Kowalski
,
N.
(
1995
). “
Ripple analysis in ferret primary auditory cortex. I. Response characteristics of single units to sinusoidally rippled spectra
,”
Aud. Neurosci.
 
1
,
233
–
254
.
23.
Shamma
,
S.
(
2003
). “
Encoding sound timbre in the auditory system
,”
IETE Journal of Research
 
49
,
193
–
205
.
24.
Slaney
,
M.
(
1998
). “
Auditory Toolbox, version 2
,”
Interval Research Corporation
Technical Report No. 1998-010.
25.
Smith
,
J. O.
(
2003
).
Mathematics of the Discrete Fourier Transform (DFT)—With Audio Applications
(
W3K
,
Stanford
).
26.
Suga
,
N.
(
1995
). “
Sharpening of frequency tuning by inhibition in the central auditory system: Tribute to Yasuji Katsuki
,”
Neurosci. Res. (N Y)
 
21
,
287
–
299
.
27.
Viemeister
,
N. F.
, and
Plack
,
C. J.
(
1991
). “
Time analysis
,” in
Human Psychophysics
, edited by
W. A.
 
Yost
,
A. N.
 
Popper
, and
R. R.
 
Fay
(
Springer
,
New York
), pp.
116
–
155
.
28.
Viemeister
,
N. F.
(
1979
). “
Temporal modulation transfer functions based upon modulation thresholds
,”
J. Acoust. Soc. Am.
 
66
,
1364
–
1380
.
29.
Wold
,
S.
,
Martens
,
H.
, and
Wold
,
H.
(
1983
). “
The multivariate calibration problem in chemistry solved by the PLS method
,” in
Proceedings of the Conference on Matrix Pencils
,
Lecture Notes in Mathematics
, edited by
A.
 
Ruhe
and
B.
 
Kågström
(
Springer
,
Berlin
), pp.
286
–
293
.
30.
Yang
,
X.
,
Wang
,
K.
, and
Shamma
,
S.
(
1992
). “
Auditory representation of acoustic signals
,”
IEEE Trans. Inf. Theory
 
38
,
824
–
838
.
31.
Yost
,
W. A.
,
Patterson
,
R. D.
, and
Sheft
,
S.
(
1998
). “
The role of the envelope in processing iterated rippled noise
,”
J. Acoust. Soc. Am.
 
104
,
2349
–
2361
.