Indiana University

The Speech Research Laboratory is a part of the Psychological and Brain Sciences department at Indiana University in Bloomington.
1101 E. 10th Street
Bloomington, IN 47405

Archive for January, 2014

28th Jan 2014

Speech Research Lab Meeting – January 31 – Jon Willits

For this week’s SRL meeting, Dr. Jon Willits, a postdoc in Mike Jones’ lab will present a WIPI style talk. His title and abstract are provided below, all are welcome and invited to attend.

When: Friday, January 31, 2014, 1:30pm
Where: Psychology room #128

Title: Semantic Models and their Applications to Vocabulary Development in Children with Cochlear Implants and Normal Hearing Children

Abstract: I will give a talk that has two parts. In the first half I will discuss semantic memory models and some of their applications to vocabulary development in typically developing children. I will show that these models can help predict interesting facts about language development, such as which words and concepts are easy and difficult to learn. The models also make suggestions about some underlying facts about the language learning process, such as the importance of different kinds of information. In the second half I will discuss some preliminary work on applying these models to language development with children with cochlear implants, such as modeling behavior on verbal fluency tasks.

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21st Jan 2014

Speech Research Lab Meeting – January 24 – Suyog Chandramouli

For this week’s SRL meeting a graduate student in our lab, Suyog Chandramouli, will be presenting a WIPI (Work-in-Progress) style presentation to discuss some new ideas about his project. Below is a brief synopsis and two readings to provide background for the discussion.

Download the two articles by clicking the following links:

WixtedRohrer1993JEPLMC- Proactive Interference and Dynamics of Free Recall

Wickens – Some Characteristics of Word Encoding

All are welcome to join.
Where: Psychology conference room #128
When: Friday, January 24, 1:30pm

“In this WIPI, I will talk about a release from proactive interference experiment that is being designed in the lab to study storage and
retrieval of speech information in memory.

The aim of the study is to obtain rankings of the relative importance of parameters of speech stimuli such as gender of talker, accents, etc. in aiding episodic memory performance, and to study how these ranks vary under conditions such as clear/processed speech, embedding in noise, etc.

Use of the release from proactive interference paradigm was pioneered by DD Wickens in the 60’s and 70’s to study coding processes in human memory. The design closely follows modifications of the PI-design by Gardiner (1972) and, John Wixted and Doug Rohrer (1993).

Studies may be conducted in the future with cochlear implant patients at different levels of expertise to glean the parameters salient to them in different listening conditions. With this knowledge, it might be possible to develop programs that would focus on training novice cochlear implant users to automatically pay attention to features important for encoding context so that they can better remember and recall information.

Attached is a short overview by Wickens of his research, and the paper by Wixted and Rohrer that will be discussed in the presentation.

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13th Jan 2014

Speech Research Lab Meeting – January 17 – Dr. Mead Killion

Please join us for this week’s SRL meeting where we welcome Dr. Mead Killion, the founder and president of Etymotic Research and adjunct professor of Speech and Hearing at Northwestern University. The title and abstract for his talk and a little background about our speaker is provided below. Dr. Killion has included a paper from the Hearing Review Killion 2004 Myths Noise and Dmics to provide some background, click the link to download the pdf. All are welcome and invited to attend.

Where: Psychology Conference Room 128

When: Friday, January 17th, 1:30pm

Remarks on hearing loss from music and noise exposure, SNR loss, SNR-loss tests, sniper-localization loss, and diplacusis.

Abstract: Review of theories about causes and effects of various hearing losses, including dead patches on the cochlea causing false pitch (Yehudi Menuhin could no longer play the violin because of his diplacusis).  A Magic Formula for predicting localization ability and intelligibility in noise under virtually any condition, given the results of a couple QuickSIN tests, and Brain Rewiring — Slow (10,000 hours for a professional musician) and Fast (reconnecting with once-learned tasks “I once could play Back Home in Indiana”) — will be discussed with regard to SNR-loss retraining.

About the speaker: Mead C. Killion, Ph.D., Sc.D.(hon)  


Mead Killion is the founder and Chief Technology Officer of Etymotic Research, an R&D organization whose mission includes:  1) Helping people hear, 2) Helping people preserve

their hearing, 3) Helping people enjoy hearing and 4) Improving hearing tests.

Mead has been Adjunct Professor of Audiology at Northwestern University for 30 years, and directed PhD research at City University of New York for several years.

He holds two degrees in mathematics and a Ph.D. in audiology, plus an honorary doctor of science from Wabash College.  He has published 86 papers and 19 book chapters in the fields of acoustics, psychoacoustics, transducers, and hearing aids, and has lectured in 19 foreign countries. Dr. Killion helped design several generations of hearing aid microphones, earphones and integrated circuit amplifiers.  His research has resulted in dramatic increases in the sound quality of hearing aids, earplugs, and earphones.

He is a past president of the American Auditory Society, which gave him a lifetime achievement award in 2010, and is a member of the Vandercook College of Music Board of Trustees.   He has 82 U.S. patents issued with 30 patents pending. Aside from his work, Dr. Killion has been a dedicated choir director for 30 years, a violinist, an amateur jazz pianist, has run 32 marathons, enjoys sailing, and has recently taken up flying.

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