|
Micheal L. Dent, Ph.D.
Binaural Physiology Laboratory Department of Physiology University of Wisconsin-Madison 1300 University Ave. Madison, WI 53706 Tel: (608) 262-2429 E-mail: dent@physiology.wisc.edu
|
|
|||
|
|
Publications
|
|
||
EDUCATION / EXPERIENCE
|
Degree/Title |
Institution |
Major Field |
Years |
|
B.A. |
1988-1992 |
||
|
Research Assistant |
1992-1994 |
||
|
M.S. |
University of Maryland |
Psychology Integrative Neuroscience Lab of Dr. Robert Dooling |
1994-1996 |
|
Summer Course |
1996 |
||
|
Visiting Research Scientist
|
1997 |
||
|
Ph.D. |
University of Maryland |
Psychology Integrative Neuroscience Lab of Dr. Robert Dooling |
1997-2001 |
|
Postdoctoral Research Fellow |
2002-present |
2004
ASA Committee on Women in Acoustics Young Investigator Travel Grant
2003
Society for Neuroscience Burroughs Wellcome Fund Postdoctoral Travel Award
2003
ASA Conference on Acoustic Communication by Animals Travel Award
2003-2006
Individual
Postdoctoral NRSA Fellowship Award
2002
Jack Bartlett
Award for Excellence in Dissertation Research Design
2000-2002
Individual Predoctoral NRSA Fellowship Award
2001
International Congress
for Neuroethology Travel Award
2001
2nd Place, Best Student
Presentation Award, Acoustical Society of America, Chicago, Illinois
2001
1st Place, Graduate Research
Interaction Day, University of Maryland
1999
2nd Place, Best Student
Presentation Award, Acoustical Society of America, Columbus, Ohio
1998-2000
CEBH (Comparative & Evolutionary
Biology of Hearing), Institutional Predoctoral NRSA Fellowship Award
1998
International Congress
for Neuroethology Travel Award
1997
DAAD (German Academic Exchange
Service), Ph.D. Student Award
1994-2000
Maryland Senatorial Scholarship
SOCIETY MEMBERSHIPS
Association for Research in
Otolaryngology
Animal Behavior Society
Acoustical Society of America
(Animal Bioacoustics Student Council Representative, 2000-2001)
International Society for Neuroethology
American Association of University Women
Sigma Xi, UM Chapter
J.B. Johnston Club
JOURNAL REFEREE: Journal
of the Acoustical Society of America, Journal of Comparative Psychology, Hearing Research
My doctoral dissertation work
was on measurements of the precedence effect in budgerigars. The precedence
effect, or the ability of the auditory system to disregard echo sounds while
localizing direct sounds, has been well-studied in humans and other animals,
but not much was known about this phenomenon in birds. We knew that
budgerigars had poor sound localization abilities, but showed a large amount
of free-field release from masking. They had also recently been discovered
to have excellent temporal resolution in fine structure discrimination tasks.
These factors made them perfect subjects for measures of echo suppression
by the auditory system. Studies of the precedence effect in the laboratory
usually involve presenting two sounds from two different locations in space.
When the two sounds are presented in close succession, the second sound (echo)
can have little to no influence on the perception of the location of the auditory
event, depending on the delay between the presentations of those sounds.
I measured the different phases of the precedence effect in budgerigars
and found that the timecourses were similar to those in humans and other animals.
I am currently a post-doc at
the Yin lab, measuring sound localization and the precedence effect in cats
(a step up in the food chain). In the Yin lab, we use identification
procedures instead of the discrimination methods that I used with the budgerigars.
Here, the cats are required to look directly at a sound source to receive
a food reward. In this way, we can pinpoint exactly where cats perceive
sounds with different properties presented from different locations in space.
Not only are the behavioral responses of the cats measured, but also simultaneous
recordings from the inferior colliculus can be taken so that we can measure
exactly what signals along the auditory pathway correlate with certain perceived
locations in space.
PUBLICATIONS (by year)
Dent, M.L., Brittan-Powell,
E.F., Dooling, R.J., and Pierce, A. (1997). Discrimination of synthetic
/ba/-/wa/ by budgerigars (Melopsittacus undulatus). Journal of the
Acoustical Society of America 102, 1891-1897. [full
text]
Dent, M.L., Larsen, O.N., and
Dooling, R.J. (1997). Free-field binaural unmasking in budgerigars
(Melopsittacus undulatus). Behavioral Neuroscience 111,
590-598. [full
text]
Farabaugh, S.M., Dent, M.L.,
and Dooling, R.J. (1998). Hearing and vocalizations of wild-caught
Australian budgerigars (Melopsittacus undulatus). Journal of Comparative
Psychology 112, 74-81. [full
text]
Ryals, B.R., Dooling, R.J.,
Westbrook, W., Dent, M.L., MacKenzie, A., and Larsen, O.N. (1999).
Avian species differences in susceptibility to noise exposure. Hearing
Research 131, 71-88. [full
text]
Leek, M.R., Dent, M.L., and
Dooling, R. J. (2000). Masking by harmonic complexes in budgerigars
(Melopsittacus undulatus). Journal of the Acoustical Society of
America 107, 1737-1744. [full
text]
Dent, M.L., Dooling, R.J., and
Pierce, A.S. (2000). Frequency difference limens by budgerigars (Melopsittacus
undulatus): Effects of tone duration and tonal context. Journal
of the Acoustical Society of America 107, 2657-2664. [full
text]
Dooling, R.J., Lohr, B., and
Dent, M.L. (2000). Hearing in birds and reptiles. Chapter in
Comparative Hearing: Birds and Reptiles (edited by R.J. Dooling,
A.N. Popper, and R.R. Fay), Springer-Verlag Publishers, pp. 308-359.
Dooling, R.J., Dent, M.L., Leek,
M.R., and Gleich, O. (2001). Masking by harmonic complexes in three
species of birds: behavioral thresholds and cochlear responses. Hearing
Research 152, 159-172. [full
text]
Dooling, R.J. and Dent, M.L.
(2001). New studies on hair cell regeneration in birds. Journal
of the Acoustical Society of Japan 22, 93-100. [full
text]
Dent, M.L., Klump, G., and Schwenzfeier,
C. (2002). Temporal modulation transfer functions in the barn owl
(Tyto alba). Journal of Comparative Physiology A 187, 937-943. [full
text]
Kubke, M.F., Dent, M.L., Carr,
C.E., Hodos, W., and Dooling, R.J. (2002). Nucleus Magnocellularis
and Nucleus Laminaris in Belgian Waterslager and normal strain canaries. Hearing
Research 164, 19-28. [full
text]
Dooling, R.J., Leek, M.R., Gleich,
O., and Dent, M.L. (2002). Auditory temporal resolution in birds:
Discrimination of harmonic complexes. Journal of the Acoustical Society
of America 112, 748-759. [full
text]
Dent, M.L., and Dooling, R.J.
(2003). Investigations of the precedence effect in budgerigars:
Effects of stimulus type, intensity, duration, and location. Journal
of the Acoustical Society of America 113, 2146-2158. [full
text]
Dent, M.L., and Dooling, R.J.
(2003). Investigations of the precedence effect in budgerigars:
Perceived location of auditory images. Journal of the Acoustical
Society of America 113, 2159-2170. [full
text]
Dent, M.L., and Dooling, R.J.
(In Press). The precedence effect in three species of birds. Journal of Comparative Psychology.
Dent, M.L., Tollin, D.J., and Yin, T.C.T. (In Press).
Psychophysical and physiological studies of the precedence effect in cats. Acta Acustica.
Dent, M.L., Tollin, D.J., and Yin, T.C.T. (Submitted).
Cats exhibit the auditory Franssen Effect illusion.
Dooling, R.J., Ryals, B.M.,
Dent, M.L., Westbrook, W., Manabe, K., and Kidd, T. (In Prep).
Recovery of hearing and vocal behavior in budgerigars after hair cell regeneration.
Dooling, R.J., Dent, M.L., Ryals,
B.M., Sleboda, R., and Mavilia, M.R. (In Prep). Recovery of
hearing in Belgian Waterslager canaries after hair cell regeneration.
Lin, J.Y., Dooling, R.J., Leek,
M.R., and Dent, M.L. (In Prep). Auditory spectral filters and
temporal windows in the budgerigar (Melopsittacus undulatus).
INVITED PRESENTATIONS
Dent, M.L. (1997). Methods
in bird psychoacoustics. Odense University, Odense, Denmark.
Dooling, R.J., Leek, M.R., and
Dent, M.L. (1999). Temporal resolution in birds and the perception
of complex sounds. Joint meeting of the Acoustical Society of America and
the European Acoustics Association, Berlin, Germany.
Dent, M.L., Brittan-Powell,
E.F., Dooling, R.J., Lohr, B., and Pater, L.L. (2000). Estimating equal
loudness contours in animals. Acoustical Society of America, Atlanta, GA.
Dent, M.L. (2001). The
precedence effect in budgerigars. University of Wisconsin, Madison, WI.
Dooling, R.J., and Dent, M.L.
(2002). General principles involved in the effect of noise on hearing
and vocal communication in birds. Acoustical Society of America, Pittsburgh,
PA.
Dooling, R.J., and Dent, M.L.
(2004). The perceptual organization of complex sounds by birds. Acoustical Society of America, New York, NY.
ABSTRACTS (by year)
Larsen, O.N., Dent, M.L., and
Dooling, R.J. (1993). Free-field release from noise masking in parakeets.
Society for Neuroscience, Washington, DC.
Larsen, O.N., Dent, M.L., and
Dooling, R.J. (1994). Free-field release from masking in the budgerigar
(Melopsittacus undulatus). 22nd Neurobiologentagung in Goettingen,
Germany.
Nespor, A.A., Dent, M.L., Lukaszewicz,
M.J., Dooling, R.J., and Ball, G.F. (1994). Testosterone induction
of male-like vocalizations in female budgerigars (Melopsittacus undulatus).
Animal Behavior Society, Seattle, WA.
Nespor, A.A., Dent, M.L., Lukaszewicz,
M.J., Dooling, R.J., and Ball, G.F. (1994). Testosterone induction
of male-like vocalizations in female budgerigars (Melopsittacus undulatus).
Society for Neuroscience, Miami, FL.
Dent, M.L., Dooling, R.J., and
Chuen, M. (1995). Perception of natural and synthetic contact calls
by budgerigars (Melopsittacus undulatus). Association for Research
in Otolaryngology, St. Petersburg, FL.
Dent, M.L., Powell, E.F., Pierce,
A.F., and Dooling, R.J. (1995). Discrimination of synthetic /ba-wa/
by budgerigars (Melopsittacus undulatus). Acoustical Society of America,
Washington, DC.
Powell, E.F., Dent, M.L, and
Dooling, R.J. (1995). Discrimination of synthetic /ba-wa/ by budgerigars
and humans. International Conference for Neuroethology, Cambridge, England.
Heaton, J.T., Dent, M.L., Dooling,
R.J., and Brauth, S.E. (1995). Lesions of a vocal control nucleus in
the budgerigar disrupt production but not perception of contact calls. Society
for Neuroscience, San Diego, CA.
Dent, M.L., Dooling, R.J., Larsen,
O.N., Amagai, S., and Carr, C.E. (1996). Free-field binaural masking
release in budgerigars (Melopsittacus undulatus). Association for
Research in Otolaryngology, St. Petersburg, FL.
Dent, M.L., Larsen, O.N., and
Dooling, R.J. (1996). Mechanisms underlying binaural phenomena in budgerigars
(Melopsittacus undulatus). Society for Neuroscience, Washington, DC.
Dent, M.L., Larsen, O.N., Dooling,
R.J., and Carr, C.E. (1996). Recent experiments on binaural phenomena
in budgerigars (Melopsittacus undulatus). Evolutionary Perspectives
on Audition, Symposium at the University of Maryland, College Park, MD.
Dent, M.L., Farabaugh, S.M.,
and Dooling, R.J. (1997). Hearing and vocalizations in wild-caught
Australian budgerigars (Melopsittacus undulatus). Association for Research
in Otolaryngology, St. Petersburg, FL.
Lin, J.Y., Dooling, R.J., and
Dent, M.L. (1997). Auditory filter shapes in the budgerigar (Melopsittacus
undulatus) derived from notched-noise maskers. Acoustical Society of America,
State College, PA.
Dooling, R.J., Dent, M.L., Kubke,
M.F., and Hodos, W. (1997). Recovery of hearing in Belgian Waterslager
canaries (Serinus canaria). Animal Behavior Society, College Park,
MD.
Dent, M.L., and Dooling, R.J.
(1998). Frequency difference limens in budgerigars (Melopsittacus
undulatus) as a function of tone duration. Association for Research in
Otolaryngology, St. Petersburg, FL.
Klump, G.M., Schwenzfeier, C.,
and Dent, M.L. (1998). Gap detection in the barn owl (Tyto alba).
Association for Research in Otolaryngology, St. Petersburg, FL.
Schwenzfeier, C., Klump, G.M.,
and Dent, M.L. (1998). Gap detection in the barn owl (Tyto alba).
26th Neurobiologentagung in Goettingen, Germany.
Dent, M.L., Klump, G.M., and
Schwenzfeier, C. (1998). Temporal resolution in the barn owl (Tyto
alba). International Conference for Neuroethology, San Diego, CA.
Dent, M.L., Dooling, R.J., Leek,
M.R., and Summers, V. (1998). Masking of tones by harmonic complexes
in the budgerigar (Melopsittacus undulatus). Acoustical Society of
America, Norfolk, VA.
Dent, M.L., Dooling, R.J., and
Leek, M.R. (1999). Perception of harmonic complexes in budgerigars
(Melopsittacus undulatus). Joint meeting of the Acoustical Society
of America and the European Acoustics Association, Berlin, Germany.
Dent, M.L., Dooling, R.J., Leek,
M.R., and Summers, V. (1999). Masking by harmonic complexes with different
phase spectra in budgerigars (Melopsittacus undulatus). Association
for Research in Otolaryngology, St. Petersburg, FL.
Dent, M.L., Klump, G.M., and
Schwenzfeier, C. (1999). Temporal modulation transfer functions in
the barn owl (Tyto alba). Association for Research in Otolaryngology,
St. Petersburg, FL.
Dent, M.L., Klump, G.M., and
Schwenzfeier, C. (1999). Temporal resolution in the barn owl (Tyto
alba) determined from temporal modulation transfer functions. 27th Neurobiologentagung
in Goettingen, Germany.
Dent, M.L., Dooling, R.J., Leek,
M.R., Mavilia, M.R., and Lohr, B. (1999). Comparative studies of masking
by harmonic complexes in several species of birds. Acoustical Society of
America, Columbus, OH.
Dent, M.L., Mavilia, M.R., Dooling,
R.J., and Leek, M.R. (2000). Temporal fine structure discriminations
in harmonic complexes by birds. Association for Research in Otolaryngology,
St. Petersburg, FL.
Dooling, R.J., Leek, M.R., Gleich
O., Dent, M.L., and Cucina, J.M. (2000). Temporal resolution in birds:
Discriminating temporal fine structure in harmonic complexes. Acoustical Society
of America, Atlanta, GA.
Kubke, M.F., Dent, M.L., and
Carr, C.E. (2000). Hypertrophy of auditory hindbrain nuclei in birds
in relation to their auditory specializations. Society for Neuroscience,
New Orleans, LA.
Dent, M.L., and Dooling, R.J.
(2001). Echo suppression in budgerigars (Melopsittacus undulatus).
Association for Research in Otolaryngology, St. Petersburg, FL.
Dent, M.L., and Dooling, R.J.
(2001). The precedence effect in budgerigars (Melopsittacus undulatus).
Acoustical Society of America, Chicago, IL.
Dent, M.L., and Dooling, R.J.
(2001). The perception of echoes by budgerigars (Melopsittacus undulatus).
International Congress for Neuroethology, Bonn, Germany.
Dent, M.L., and Dooling, R.J.
(2002). Investigations of the precedence effect in budgerigars (Melopsittacus
undulatus). Association for Research in Otolaryngology, St. Petersburg,
FL.
Kubke, M.F., Dent, M.L., Carr,
C.E., and Dooling, R.J. (2002). Morphological analysis of hindbrain
time coding in three species of birds. Association for Research in Otolaryngology,
St. Petersburg, FL.
Dent, M.L., Tollin, D.J., and Yin, T.C.T. (2003). The localization of single and multiple source stimuli by cats. Association for Research in Otolaryngology, Daytona Beach, FL.
Leek, M.R., Dooling, R.J., Gleich, O., and Dent, M.L. (2003). Discrimination of temporal fine structure by birds and mammals. XIII International Symposium on Hearing, Seillac, France.
Tollin, D.J., Dent, M.L., and Yin, T.C.T. (2003). Psychophysical and physiological studies of the precedence effect and echo threshold in the behaving cat. XIII International Symposium on Hearing, Seillac, France.
Dent, M.L., Tollin, D.J., and Yin, T.C.T. (2003). The localization of single and multiple source stimuli by cats. First Conference on Acoustic Communication by Animals, College Park, MD.
Dent, M.L., Tollin, D.J., and Yin, T.C.T. (2003). The effect of stimulus location on the psychophysics and physiology of the precedence effect in cats. Society for Neuroscience, New Orleans, LA.
Dent, M.L., Tollin, D.J., and Yin, T.C.T. (2004). The influence of sound source position on free-field measurements of the precedence effect in cats. Association for Research in Otolaryngology, Daytona Beach, FL.
Yin, T.C.T., Tollin, D.J., and Dent, M.L. (2004). Physiological correlates of behavior in the inferior colliculus: studies of the precedence effect. Association for Research in Otolaryngology, Daytona Beach, FL.