119 Coordinated Science Laboratory
1308 West Main Street
Urbana, IL 61801

Video overview of my research: Ryan Corey - 2018 CSL Student Conference

New wearable microphone dataset: Wearable Microphone Impulse Responses - Illinois Data Bank

I am a seventh-year graduate student in Electrical and Computer Engineering at the University of Illinois at Urbana-Champaign. My interests include audio processing, human and machine audition, statistical signal processing, machine learning, and information theory. I am advised by Professor Andrew Singer in the Coordinated Science Laboratory and supported by the the NSF Graduate Research Fellowship Program and the Microsoft Research Dissertation Grant. My current research is on multimicrophone audio signal processing, especially for listening devices such as hearing aids. I have also also worked on information processing systems built with unreliable emerging device technologies.

I grew up in the Chicago area and received a BSE degree in Electrical Engineering from Princeton University in 2012. As an undergraduate I studied optoelectronics and photonics, particularly photonic communication and signal processing. I also worked on robotics with Princeton Autonomous Vehicle Engineering (PAVE). At Illinois I participate in advocacy and mentoring activities with Out in STEM (oSTEM) and several engineering professional organizations. In my spare time I enjoy tinkering with circuits, automation, electronic lighting, and audio systems.

Teaching History

Term Course
Spring 2019

ECE 310: Digital Signal Processing
Instructor of record

TE 401: Develop Breakthrough Projects
Project mentor

Fall 2018 TE 401: Develop Breakthrough Projects
Project mentor
Spring 2018 TE 401: Develop Breakthrough Projects
Project mentor
Fall 2017 TE 401: Develop Breakthrough Projects
Project mentor
Summer 2017 ECE 310: Digital Signal Processing
Primary instructor - List of teachers rated excellent by students
Fall 2014 ECE 310: Digital Signal Processing
Homework & exam TA
Spring 2013 ECE 445: Senior Design
Lab TA - List of teachers rated excellent by students
Fall 2012 ECE 110: Introduction to Electrical and Computer Engineering
Lab TA - List of teachers rated excellent by students
Spring 2012 ELE 302: System Design and Analysis
Undergraduate TA
Spring 2011 ELE 302: System Design and Analysis
Undergraduate TA

I work with Professor Andrew Singer in the Coordinated Science Laboratory at the University of Illinois. I am developing new signal processing methods to enhance human and machine hearing in noisy environments, with an emphasis on hearing aid applications. In particular, my work focuses on microphone array processing for real-time noise reduction and signal enhancement.

My M.S. thesis was on mixed-signal interfaces using unreliable components. I used tools from statistical estimation theory to find fundamental limits on the performance of such systems and provide new analytical tools and metrics for mixed-signal circuit design.

I am supported by the National Science Foundation Graduate Research Fellowship Program and the Microsoft Research Dissertation Grant. I have also been supported by the Systems on Nanoscale Information fabriCs (SONIC) Center, an SRC Starnet center.

University of Illinois - PhD Thesis Research

Microphone Arrays

Large microphone arrays, with dozens or hundreds of elements, can better localize and separate signals than conventional small arrays. We are building and characterizing large microphone arrays, including wearable arrays (Wearable Dataset 2018), for machine listening and human listening enhancement applications. Our team of undergraduate and graduate researchers works in the Illinois Augmented Listening Laboratory, a new space for multichannel audio and acoustics research.

Multichannel Audio Enhancement for Human Listeners

Array processing is often used for machine listening applications. However, it could also improve the performance of real-time listening devices such as hearing aids. Such devices could apply independent processing to multiple sound sources at once. Human listening applications have different constraints, such as spatial cue preservation (WASPAA 2017a), nonlinear processing (WASPAA 2017b), and delay constraints (IWAENC 2018b).

Multichannel Processing of Sparse Signals

Speech signals are sparse in the time-frequency domain. We use sparse signal models, which are typically applied in single-microphone source separation, to improve the performance of multimicrophone systems. Sparsity can help with array calibration (LVA ICA 2018), separating underdetermined mixtures (WASPAA 2017a), and compensating for sample rate mismatch in ad hoc arrays (IWAENC 2018a).

University of Illinois - Other Projects

Stochastic ADC


High-speed analog-to-digital converters need large, power-hungry transistors. We show how to use statistical methods to digitize signals using unreliable circuits built with smaller, lower-power transistors. (MS Thesis, JSPS 2015)

Coarsely Quantized Array Processing


Coarsely quantized analog-to-digital converters require less power and area than high-resolution analog-to-digital converters. We have evaluated coarse quantization for spatial error shaping (WSA 2016) and source localization (CAMSAP 2017).

Princeton University

Photonic Beamforming


For my senior thesis, I worked on a wideband adaptive beamforming array that uses all-optical tapped delay line filters. I developed a model, performed simulations, and wrote control software for the photonic system.

Multimode Coupling


I worked with the Princeton Lightwave Communications Lab to characterize the performance of a single-mode to multimode coupler, which can combine many signals of the same wavelength without distortion from coherent beating.

LMWC 2013

Mid-Infrared Flashlight


I worked with MIRTHE to design a low-coherence mid-infrared light source for trace gas sensing.

Multimicrophone Audio Enhancement

Coarsely Quantized Array Processing

Stochastic Quantization




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Research Data & Demos

Wearable Microphone Dataset

An open-access dataset of acoustic impulse responses measured at 160 positions on the body and various wearable accessories from 24 directions of arrival.

Asynchronous Source Separation

Demonstration of asynchronous source separation using hat-mounted microphone arrays on moving listeners. The algorithm is from our entry into SiSEC 2018 ASY and an IWAENC 2018 paper.

Personal Projects


I designed the electronics in Phobetor, an autonomous navigating robot built by Princeton Autonomous Vehicle Engineering for the Intelligent Ground Vehicle Competition.

Dancing Roomba

I led a PAVE team to design and build a giant dancing Roomba that appeared in the Princeton Triangle Club's 2012 musical, Doomsdays of Our Lives. I controlled it remotely from backstage.

Slot Machine

For a senior design class, I hacked a Japanese "skill-stop" slot machine with a microcontroller and speakers. This video shows the machine changing the losing spin to a winning spin. It also has a smartphone web interface.


For a junior design class, I created this line-following robot named Moosebot. It uses a camera and microcontroller to follow the track. It also has an arm that collects plastic cups and drops them off at user-specified locations.

Christmas Lights

In 2008 I built a Christmas light control unit for my house. It was later installed at the Princeton Quadrangle Club and sychronized with dance music. Unfortunately, one of the chips melted before a video could be produced, so you'll have to take my word for it.

Gaming Table

I led a team to build a pair of game tables at the Princeton Quadrangle Club. One is a bottlecap table containing several thousand bottlecaps. The other is an electronic table with music-sensing lights.

Conferences and Events


Tokyo, Japan, September 2018

LVA ICA 2018

Guildford, UK, June 2018

Engineering Open House 2018

Urbana, IL, March 2018

CSL Student Conference 2018

Urbana, IL, February 2018


Curacao, December 2017

Asilomar 2017

Pacific Grove, CA, October 2017

SANE 2017

New York City, October 2017


New Paltz, NY, October 2017

SONIC 2017

Champaign, IL, October 2017

SRC Techcon 2017

Austin, TX, September 2017

Asilomar 2016

Pacific Grove, PA, November 2016

SONIC 2016

Champaign, IL, October 2016

MLSP 2016

Vietri Sul Mare, Italy, September 2016

SRC TechCon 2016

Austin, TX, September 2016

DAC 2016

Austin, TX, June 2016

WSA 2016

Munich, Germany, March 2016

Asilomar 2015

Pacific Grove, CA, November 2015

SONIC 2015

Champaign, IL, October 2015/em>

SRC Techcon 2015

Austin, TX, September 2015

SiPS 2014

Belfast, Northern Ireland, October 2014

SONIC 2014

Urbana, IL, October 2014

SRC Techcon 2014

Austin, TX, September 2014

SAM 2014

A Coruna, Spain, June 2016

oSTEM 2013

New York City, October 2013

SONIC 2013

Urbana, IL, October 2013

IvyQ 2011

New York City, February 2011

IvyQ 2010

Philadelphia, PA, February 2010


New York City, August 2009

Last modified 27 December 2018