Since 2011, I have been a research scientist at GN ReSound, where I am a principal investigator on several projects relating to hearing science and digital signal processing.
2007-2011: Ran a consulting business (LSB Audio, LLC) part-time while working on my PhD.
2003-2007: DSP Engineer at Shure Incorporated where I contibuted to a couple Advanced Development projects. I was a summer intern in 2003 & 2004, then a full-time employee from May 2005 through August 2007.
2000-2002: Three summer internships at Motorola doing everything from reverse engineering other company's cell phones to designing the audio system for OnStar.
1998: Spent the summer after highschool doing electronics assembly and repair at DriveCon.
Ph.D., Biomedical Engineering - Purdue University (expected 2013)
Thesis: "Effects of hearing aid amplification of robust speech coding"
M.S., Music Engineering - University of Miami (2005)
Thesis: "Auditory Component Analysis: Using Perceptual Pattern Recognition to Identify and Extract Independent Components From an Auditory Scene".
- MPEG Committee (Represented the University of Miami at MPEG Meetings)
- Conducted Listening Tests for Spatial Audio Coding
- Worked with others to define standards and develop an audio library
- Adaptive Feedback Reduction (Implemented an adaptive filter that removes acoustic feedback)
- Comparison of Cochlear Filter Banks (Compared Lyon's auditory filterbank with the ERB model. Note: I now realize there were several problems with this study. For instance, the 3 things I was comparing were very different things and probably should never have been compared in this way.)
- MPEG Psychoacoustic Model 2 for Matlab (Click HERE for the code.)
- Audio Steganography (Hiding data in an audio signal... included noise shaping and lossless compression)
B.S., Electrical Engineering - University of Illinois at Urbana-Champaign (2003)
Senior Design Project: Designed a portable audio spatializer for headphones (using Dolby algorithms on a 56k DSP)
- Perceptual Audio Coding (Learning to implement coders like MP3, AAC, AC3, etc.)
- Psychoacoustics (Imlementing various principles of psychoacoustics in Matlab)
- Audiovisual Speech Recognition in Automotive Environment (A project at The Beckman Institute that used 2 cameras and 2 microphones to enhance speech recognition)
- Automotive Hands-Free Telephones (echo-cancellation, noise-reduction, objective analysis of audio quality)
- Surround-Sound Headphones Used MIT's HRTF data to create a virtual 3D environment
- Using FFT's as Band-Pass Filters
- Determing Loudspeaker Response (reference: C.A. Ewaskio and O.K. Mawardi (1950), "Electroacoustic Phase Shift in Loudspeakers." Journal of the Acoustical Society of America 22(4):444-448.)
- Sound Analysis/Synthesis Techniques (reference: R.J. McAulay and T.F. Quatieri (1986), "Speech Analysis/ Synthesis Based on a Sinusoidal Representation." IEEE Transactions. ASSP 34(4):744-754.)
- Pitch Perception (reference: J.C.R. Licklider, "A Duplex Theory of Pitch Perception." Experientia VII(4):128-134.)
- Basic Audio Coding (reference: Noll, "MPEG Digital Audio Coding," IEEE Signal Processing Magazine, Sept. '97.)
- Advanced Coding Techniques (includes Water-Filling Bit Allocation and Sub-Band Quantization Using Signal-Mask Ratio)
- Speech Recognition (reference: Steven P. Davis and Paul Mermelstein, "Comparison of Parametric Representations for Monosyllabic Word Recognition in Continuously Spoken Sentences." IEEE Transactions ASSP 28(4):357-366.)
- Adaptive Filtering
Other education:
Project Management Professional (2010-Present)
Masters Certificate, Project Management - The George Washington University, Washington D.C. (2009)
Applied Management Principles ("Mini-MBA" Course) Purdue University, West Lafayette, IN (2008)
Certificate, Electronic Equipment Repair Lake County Area Vocational Center, Grayslake, IL (1998)
My passion is studying audio perception, both behavioral and neurological. By combining my knowledge of psychoacoustics and auditory neurophysiology with my experience in digital signal processing, I enjoy creating technologies that improve audio quality.
I'm slowly working on a wiki of auditory knowledge. Check out the (very) early form at http://www.perceptualentropy.com/wiki
Some areas of research that I'm interested in include:
Boley, J., M. Lester, and C. Danner, "Measuring Dynamics: Comparing and Contrasting Algorithms for the Computation of Dynamic Range" 2010 (129th Audio Engineering Society Convention).
Gaston, L., J. Boley, S. Selter, and J. Ratterman, "The Influence of Individual Audio Impairments on Perceived Video Quality" 2010 (128th Audio Engineering Society Convention).
Heinz, M., J. Swaminathan, J. Boley, and S. Kale, "Across-Fiber Coding of Temporal Fine-Structure: Effects of Noise-Induced Hearing Loss on Auditory Nerve Responses," in The Neurophysiological Bases of Auditory Perception. Springer (New York), 2010.
Kale, S., J. Boley, J. Swaminathan, M. Heinz, "Within and across fiber temporal fine structure coding following noise induced hearing loss," February 2010 (Poster at the 33rd Midwinter Meeting of the Association for Research in Otolaryngology)
Boley, J. and M. Lester, "Statistical Analysis of ABX Results Using Signal Detection Theory" 2009 (127th Audio Engineering Society Convention)
[Click HERE for supplemental information.]
Boley J., "Improving hearing aid dynamic gain control algorithms based on auditory nerve coding," 2008 (Qualifying Literature Assessment for Ph. D. Dissertation, Purdue University)
Boley J. and M. Heinz, "Quantifying the Effects of Hearing Aid Dynamics on Temporal Coding in the Auditory Nerve," September 2008 (Poster at the First International Symposium on Audible Acoustics in Medicine and Physiology, Purdue University)
Lester M. and Boley J., "The Effects of Latency on Live Sound Monitoring", 2007. (123rd Audio Engineering Society Convention)
Boley J., "Auditory Component Analysis," 2006 (121st Audio Engineering Society Convention)
Boley J., "Auditory Component Analysis: Using Perceptual Pattern Recognition to Identify and Extract Independent Components from an Auditory Scene," 2005 (University of Miami Master's Thesis)