Michael G. Heinz, Ph.D.

                                                                                                                       

Heinz BME photoAssociate Professor of Speech, Language, and Hearing Sciences

Associate Professor of Biomedical Engineering

Purdue University

 

Office: HEAV G34C

Lab: PRCE 177

Auditory Neurophysiology & Modeling Lab

 

500 Oval Drive

Heavilon Hall

West Lafayette, IN 47907 USA

(765) 496-6627 (office)
(765) 496-2613 (lab)
(765) 494-0771 (fax)

mheinz@purdue.edu

Curriculum Vitae

 

 

RESEARCH STATEMENT

The long-term goals of my research program are to understand the neural bases for robust speech perception by studying the effects of sensorineural hearing loss on neural coding, and to transfer this knowledge to technologies that improve the lives of people with hearing loss.  My research involves the coordinated use of neurophysiology, psychoacoustics, and computational modeling. This multi-disciplinary approach provides a powerful framework to extend our understanding of the effects of different types of hearing loss on neural and perceptual responses to sound.  This knowledge will be extremely valuable for developing diagnostic tests, for evaluating the limitations of current hearing aids, and for suggesting novel strategies for hearing aids and cochlear implants.  In addition, a better understanding of the salient features of speech and how the normal auditory system processes these features with ease will have implications for  auditory signal processing technologies, such as automatic speech recognition, speech compression, and sound-source segregation.

 

SPECIFIC INTERESTS

-- neural coding in normal and impaired auditory systems

-- neural mechanisms for enhanced speech coding

-- models of auditory signal processing and perception

-- psychoacoustics

-- auditory prostheses

 

TEACHING

Speech, Language, and Hearing Sciences (SLHS)

SLHS 658: Signal Processing for Hearing and Speech Sciences  (Spring 2006, Spring 2009)

SLHS 504: The Auditory Periphery (Fall 2006-2010)

SLHS 444: Introduction to Research in Communication Sciences and Disorders (Spring 2007)

 

Biomedical Engineering (BME)

BME 695M: Computational Modeling of Hearing Impairment (Fall 2006)

BME 595B: Biomedical Signal Processing (Spring 2007, Fall 2008, Fall 2010)

 

Integrative Neuroscience (PULSe

)

BIO695S/SLHS 658S: Special Lectures in Neuroscience: Auditory Neuroscience (Spring 2008)

 

 

 

 

EDUCATION

 

Ph.D. (2000) Massachusetts Institute of Technology, Speech and Hearing Sciences, Division of Health Sciences and Technology
Dissertation Title: "Quantifying the effects of the cochlear amplifier on temporal and average-rate information in the auditory nerve"  (Abstract; full text available by request)
Dissertation Advisor: Laurel H. Carney, Ph.D.

M.S.E. (1994) Johns Hopkins University, Electrical and Computer Engineering

Sc.B. (1992) Brown University, Engineering (Electrical)

 

PROFESSIONAL EXPERIENCE

 

Associate Professor (2011 - present) Departments of Speech, Language, & Hearing Sciences and Biomedical Engineering, Purdue University.

Assistant Professor (2005 - 2011) Departments of Speech, Language, & Hearing Sciences and Biomedical Engineering, Purdue University.

Research Associate (2004 - 2005) Department of Biomedical Engineering, Johns Hopkins University.

NIH Postdoctoral Fellow (2000 - 2004) Department of Biomedical Engineering, Johns Hopkins University, Supervisor: Eric D. Young, Ph.D.

Research Assistant (1995 - 2000) Hearing Research Center and Department of Biomedical Engineering, Boston University

NIH Predoctoral Fellow (1995 - 1999) Speech and Hearing Sciences Program, Division of Health Sciences and Technology, Harvard University - Massachusetts Institute of Technology

Research Assistant (1992 - 1995) Department of Electrical and Computer Engineering and Department of Otolaryngology, Johns Hopkins University

Technical Aid (1991) Applied Physics Laboratory, Johns Hopkins University

 

EXTRAMURAL SUPPORT

 

Effects of sensorineural hearing loss on robust speech coding, Principal Investigator, R01 grant from NIH (NIDCD, R01-DC009838), 9/18/09-8/31/14.

 

Temporal effects in simultaneous masking, forward masking and suppression, Co-Investigator (PI: E. Strickland), R01 grant from NIH (NIDCD, R01-DC008327), 3/1/08-2/28/13.

 

Effects of hearing aid amplification on robust speech coding, Sponsor (PI: J. Boley; Co-Sponsor: D. Fekete), NRSA Pre-doctoral Fellowship from NIH (NIDCD, F31-DC010966), 1/1/10-12/31/11.

 

The effects of noise-induced hearing loss on across-fiber temporal coding in the auditory nerve, Principal Investigator, Grant-in-Aid from National Organization for Hearing Research Foundation, 1/30/09-1/29/10.

 

Effects of sensorineural loss on robust speech coding, Principal Investigator, R03 grant from NIH (NIDCD), 12/13/04-11/30/09.

 

The effects of selective hair-cell damage on temporal envelope coding in the auditory nerve, Principal Investigator, Grant-in-aid from American Hearing Research Foundation, 1/1/08-12/31/08.

 

Cross-frequency coincidence detection as a neural mechanism for enhanced spectral coding, Principal Investigator, Grant-in-Aid from National Organization for Hearing Research Foundation, 1/16/04-1/15/05.

 

Level encoding in the auditory nerve and cochlear nucleus of hearing-impaired cats, Principal Investigator, Individual National Research Service Award, Postdoctoral Fellowship from NIH (NIDCD), 2/1/02-1/31/04.

 

PUBLICATIONS

 Heinz, M.G. (in press). Intensity Coding throughout the Auditory System. In K.L. Tremblay and R. Burkard (Eds.) Translational Perspectives in Auditory Neuroscience, Plural Publishing, to be published April 2012.

Henry, K.S., Kale, S., Scheidt, R.E., and Heinz, M.G. (2011). “Auditory brainstem responses predict auditory nerve fiber thresholds and frequency selectivity in hearing impaired chinchillas,” Hear. Res., 280, 236-244.

Bidelman, G.M. and Heinz, M.G. (2011). “Auditory-nerve responses predict pitch attributes related to musical consonance and dissonance for normal and impaired hearing,” J. Acoust. Soc. Am., 130, 1488-1502.

Swaminathan, J. and Heinz, M.G. (2011). “Predicted effects of sensorineural hearing loss on across-fiber envelope coding in the auditory nerve,” J. Acoust. Soc. Am., 129, 4001-4013.

Jennings, S.G., Heinz, M.G., and Strickland, E.A. (2011). Evaluating adaptation and olivocochlear efferent feedback as potential explanations of psychophysical overshoot,” J. Assoc. Res. Otolaryngology, 12, 345-360.  

Kale, S. and Heinz, M.G. (2010). “Envelope coding in auditory nerve fibers following noise-induced hearing loss,” J. Assoc. Res. Otolaryngology, 11, 657-673.

Scheidt, R.E., Kale, S. and Heinz, M.G. (2010). “Noise-induced hearing loss alters the temporal dynamics of auditory-nerve responses,” Hear. Res., 269, 23-33.

Heinz, M.G. (2010). “Computational modeling of sensorineural hearing loss,” In R. Meddis, E.A. Lopez-Poveda, R.R. Fay, A.N. Popper (Eds.), Computational Models of the Auditory System [Springer Handbook of Auditory Research (SHAR)], Springer, New York, pp. 177-202.

Heinz, M.G., Swaminathan, J., Boley, J.D., and Kale, S. (2010). “Across-fiber coding of temporal fine-structure: Effects of noise-induced hearing loss on auditory-nerve responses,” In: E.A. Lopez-Poveda, A.R. Palmer, and R. Meddis (Eds.), The Neurophysiological Bases of Auditory Perception, New York: Springer, pp. 621-630.

Heinz, M.G. and Swaminathan, J.  (2009). “Quantifying envelope and fine-structure coding in auditory nerve responses to chimaeric speech,” J. Assoc. Res. Otolaryngology, 10, 407-423.

Florentine, M. and Heinz, M.G. (2009) “Audition: Loudness,” In: E.B. Goldstein ed., Encyclopedia of Perception. Thousand Oaks, California: Sage Publications, pp. 145-151.

Jennings, S.G., Strickland, E.A., and Heinz, M.G.  (2009).  Precursor Effects on Behavioral Estimates of Frequency Selectivity and Gain in Forward Masking,” J. Acoust. Soc. Am., 125, 2172-2181.  Full Text (pdf)

Chintanpalli, A., and Heinz, M.G.  (2007). “The effect of auditory-nerve response variability on estimates of tuning curves,  J. Acoust. Soc. Am. 122, EL203-EL209.  Full Text (pdf)

Heinz, M.G. (2007). “Spatiotemporal encoding of vowels in noise studied with the responses of individual auditory nerve fibers,” In B. Kollmeier, G. Klump, V. Hohmann, U. Langemann, M. Mauermann, S. Uppenkamp and J. Verhey (Eds.), Hearing – From Sensory Processing to Perception. Heidelberg: Springer Verlag, pp 107-115.  Full Text (pdf)

Heinz, M.G., Issa, J.B., and Young, E.D. (2005).  Auditory-nerve rate responses are inconsistent with common hypotheses for the neural correlates of loudness recruitment," J. Assoc. Res. Otolaryngology 6, 91-105.   Full Text (pdf)

Heinz, M.G., Scepanovic, D., Issa, J., Sachs, M.B., and Young, E.D. (2005).  “Normal and impaired level encoding: Effects of noise-induced hearing loss on auditory-nerve responses,” In D. Pressnitzer, A. de Cheveigné, S. McAdams, L. Collet (Eds.) Auditory Signal Processing: Physiology, Psychoacoustics and Models. New York: Springer.       Full Text (pdf)

Heinz, M.G., and Young, E.D. (2004).  Activity growth rates in auditory-nerve fibers after noise-induced hearing loss,” J. Neurophysiol. 91, 784-795.   Full Text (pdf)

Colburn, H.S., Carney, L.H., and Heinz, M.G. (2003).  "Quantifying the information in auditory-nerve responses for level discrimination," J. Assoc. Res. Otolaryngology, 4, 294-311Full Text (pdf)

Heinz, M.G., Colburn, H.S., and Carney, L.H. (2002). "Quantifying the implications of nonlinear cochlear tuning for auditory-filter estimates," J. Acoust. Soc. Am., 111, 996-1011Full Text (pdf)

Carney, L.H., Heinz, M.G., Evilsizer, M.E., Gilkey, R.H., and Colburn, H.S. (2002). "Auditory phase opponency: A temporal model for masked detection at low frequencies," Acustica - Acta Acustica 88, 334-347Full Text (pdf)

Formby, C., Heinz, M.G., and Aleksandrovsky, I.V. (2002).  "Temporal integration of sinusoidal increments in the absence of absolute energy cues," J. Speech Lang. Hear. Res. 45, 1285-1296. Full Text (pdf)

Heinz, M.G., Colburn, H.S., and Carney, L.H. (2001). "Rate and timing cues associated with the cochlear amplifier: Level discrimination based on monaural cross-frequency coincidence detection," J. Acoust. Soc. Am. 110, 2065-2084Full Text (pdf)

Heinz, M.G., Colburn, H.S., and Carney, L.H. (2001). "Evaluating auditory performance limits: I. One-parameter discrimination using a computational model for the auditory nerve," Neural Computation 13, 2273-2316Full Text (pdf)

Heinz, M.G., Colburn, H.S., and Carney, L.H. (2001). "Evaluating auditory performance limits: II. One-parameter discrimination with random level variation," Neural Computation 13, 2317-2339Full Text (pdf)

Heinz, M.G., Zhang, X., Bruce, I.C., and Carney, L.H. (2001). "Auditory-nerve model for predicting performance limits of normal and impaired listeners," Acoustic Research Letters Online 2, 91-96Full Text (pdf); Model code available.  Also see Carney website.

Zhang, X., Heinz, M.G., Bruce, I.C., and Carney, L.H. (2001). "A phenomenological model for the responses of auditory-nerve fibers: I. Nonlinear tuning with compression and suppression," J. Acoust. Soc. Am. 109, 648-670Full Text(pdf); Model code available.  Also see Carney website.

Heinz, M.G., and Formby, C. (1999). "Detection of time- and band-limited increments and decrements in a random-level noise," J. Acoust. Soc. Am. 106, 313-326Full Text (pdf)

Heinz, M.G., Goldstein, M.H. Jr., and Formby, C. (1996). "Temporal gap detection thresholds in sinusoidal markers simulated with a multi-channel, multi-resolution model of the auditory periphery," Aud. Neurosci. 3, 35-56Abstract (pdf)

Formby, C., Heinz, M.G., Luna, C.E., and Shaheen, M.K. (1994). "Masked detection thresholds and temporal integration for noise band signals," J. Acoust. Soc. Am. 96, 102-114Full Text (pdf)

 

CONFERENCE PRESENTATIONS

 

Invited Talks

Heinz, M.G. “Auditory Signal Processing: Quantifying envelope and fine-structure coding in auditory-nerve responses to chimaeric speech,” Invited talk presented at the First International Symposium on Audible Acoustics in Medicine and Physiology, Purdue University, September 2008.

Heinz, M.G., and Swaminathan, J.  “Neural cross-correlation metrics to quantify envelope and fine-structure coding in auditory-nerve responses,” J. Acoust. Soc. Am. 123(A), 3056, Invited talk, Paris, France, July 2008.

Heinz, M.G. “The cochlea and its role in hearing,  Self Help for Hard of Hearing People, Baltimore Chapter Meeting, September, 2004.

Heinz, M.G., and Young, E.D. “Auditory-nerve rate responses are inconsistent with common hypotheses for the neural correlates of loudness recruitment,” International Hearing Aid Research Conference (IHCON), Lake Tahoe, CA, August, 2004.

Heinz, M.G. "Quantifying the effects of the cochlear amplifier on temporal and average-rate information in the auditory nerve," Conference on Perceptual Consequences of Cochlear Nonlinearity, Hanse Institute for Advanced Study, Delmenhorst, Germany, August, 2001. 

 

Abstracts (selected)

Swaminathan, J., and Heinz, M.G.  “Neural coding of envelope and fine structure in noise degraded speech,” J. Acoust. Soc. Am. 123(A), 3720, Paris, France, July, 2008. (Winner, Best Student Paper Award in Psychological and Physiological Acoustics, 2nd prize).

Jennings, S., Heinz, M., and Strickland, E.  “Exploring the psychophysical temporal effect in masking using a model of the auditory periphery,” J. Acoust. Soc. Am. 123(A), 3860, Paris, France, July, 2008.

Kale, S., and Heinz, M.G. (2008). “Envelope coding in auditory-nerve fibers following noise-induced hearing loss,” Assoc. for Res. in Otolaryngology Abstracts 31, 77.

Chintanpalli, A., and Heinz,  M.G. (2008). “Modeling the effects of selective hair-cell damage on concurrent vowel identification,” Assoc. for Res. in Otolaryngology Abstracts 31, 146.

Swaminathan, J., and Heinz,  M.G. (2007). “Quantifying envelope coding in auditory-nerve responses to chimaeric stimuli,” Conference on Implantable Auditory Prostheses, Lake Tahoe, CA.

Holmen, A.L., and Heinz, M.G. (2006). “Noninvasive assays for determining auditory efferent reflex strength,” BMES Conference, Chicago, IL.

Heinz, M.G. (2005). “Spectral coding based on cross-frequency coincidence detection of auditory-nerve responses,” Assoc. for Res. in Otolaryngology Abstracts 28, 27Poster (pdf).

Young, E.D., Ji, T., Bruce, I., and Heinz, M.G. (2004). “Information about speech segments in the normal and impaired auditory nerve,” International Hearing Aid Research Conference (IHCON), Lake Tahoe, CA.

Heinz, M.G., Issa, J.B., and Young, E.D. (2004). “Level coding in the auditory nerve following noise-induced hearing loss,” Assoc. for Res. in Otolaryngology Abstracts 27, 324Poster (pdf).

Young, E.D., Heinz, M.G., Bandyopadhyay, S., Ji, T., and Bruce, I. (2004). “What about the consonants?” Assoc. for Res. in Otolaryngology Abstracts 27, 324.  

Heinz, M.G., Sachs, M.B., and Young, E.D. (2003). “Activity growth rates in auditory-nerve fibers following noise-induced hearing loss,” Assoc. for Res. in Otolaryngology Abstracts 26, 46-47Poster (pdf).

Heinz, M.G., Sachs, M.B., and Young, E.D. (2002). “Activity growth rates in auditory-nerve fibers following noise-induced hearing loss,” International Hearing Aid Research Conference (IHCON), Lake Tahoe, CA.  

Heinz, M.G., Kim, D., Sachs, M.B., and Young, E.D. (2002). "A baseline characterization of activity growth in auditory-nerve fibers of normal-hearing cats," Assoc. for Res. in Otolaryngology Abstracts 25, 87.

Carney, L.H., Evilsizer, M.E., Gilkey, R.H., Heinz, M.G., and Colburn, H.S. (2001). "Modelling diotic and dichotic detection of tones in reproducible noise," Assoc. for Res. in Otolaryngology Abstracts 24, 86-87.

Heinz, M.G., Colburn, H.S., and Carney, L.H. (2000). "Quantifying effects of the cochlear amplifier on temporal and average-rate information in the auditory nerve," International Hearing Aid Research Conference (IHCON), Lake Tahoe, CA.

Heinz, M.G., Colburn, H.S., and Carney, L.H. (2000). "Quantifying the effects of noise maskers on signal information in auditory-nerve responses," Assoc. for Res. in Otolaryngology Abstracts 23, 276.

Heinz, M.G., Formby, C., Sherlock, L.P., Ronson, B. and Carney, L.H. (2000). "Strategies for detection of temporal- and spectral-profile cues," Assoc. for Res. in Otolaryngology Abstracts 23, 106.

Zhang, X., Heinz, M.G., and Carney, L.H. (1999). "Nonlinear compression in an auditory-nerve model," EMBS-BMES Joint Conference, October, Atlanta, GA.

Heinz, M.G., Carney, L.H., and Colburn, H.S. (1999). "Monaural, cross-frequency coincidence detection as a mechanism for decoding the perceptual cues provided by the cochlear amplifier," J. Acoust. Soc. Am. 105(A), 1023, Berlin, Germany.

Heinz, M.G., Carney, L.H., and Colburn. H.S. (1999). "Performance limits for frequency and intensity discrimination based on a computational auditory-nerve model," Assoc. for Res. in Otolaryngology Abstracts 22, 212.

Carney, L.H., Heinz, M.G., Colburn, H.S. (1999). "Spatiotemporal coding of sound level: Quantifying the information provided by level-dependent phase cues," Assoc. for Res. in Otolaryngology Abstracts 22, 212-213.

Heinz, M.G., and Carney, L.H. (1998). "Periodicity versus place for frequency discrimination revisited: Optimal decision theory analysis of a modern computational auditory-nerve model," Assoc. for Res. in Otolaryngology Abstracts 21, 137.

Heinz, M.G. and Carney, L.H. (1997). "A psychophysiological multi-cue model for the detection of time- and band-limited increments and decrements in noise," Assoc. for Res. in Otolaryngology Abstracts 20, 229.

Heinz, M.G., Formby, C., and Mortimer, K.L. (1994). "Effects of rise/fall time on masked detection thresholds and temporal integration for noise band signals," J. Acoust. Soc. Am. 96(A), 3257-3258.

Heinz, M.G., Goldstein, Jr., M.H., Formby, C, and Forrest, T.G. (1994). "Temporal gap detection thresholds in sinusoidal markers simulated with a multi-channel, multi-resolution cochlear model," J. Acoust. Soc. Am. 95(A), 2941.

Formby, C., Heinz, M.G., Luna, C.E., and Shaheen, M.K. (1994). "A multi-cue detection model for predicting masked detection thresholds for noise band signals," Assoc. for Res. in Otolaryngology Abstracts 17, 117.

Formby, C., Heinz, M.G., and Luna, C.E. (1993). "Prediction of masked detection thresholds for noise signals centered in a gated noise masker," J. Acoust. Soc. Am. 94(A), 1776.

 

PROFESSIONAL SOCIETIES 

 

Memberships

Acoustical Society of America

Association for Research in Otolaryngology

 

page last updated  Oct 2011