Marshall Chasin

Marshall Chasin, AuD, is an audiologist and the Director of Auditory Research at the Musicians’ Clinics of Canada, Adjunct Professor at the University of Toronto (in Linguistics), Associate Professor in the School of Communication Disorders and Sciences at the Western University. He is the author of over 200 articles and 7 books including Musicians and the Prevention of Hearing Loss. Dr. Chasin has been the recipient of many awards over the years including the 2012 Queen Elizabeth II Silver Jubilee Award for service to Canada and the Canada 150 Medal in 2017. He has developed a new TTS app called Temporary Hearing Loss Test app.

The Acoustics of Hearing Aids: Damping and Impedance- Part 2

Marshall Chasin

Last week in part 1 of this blog series, we reviewed standing waves found in hearing aids, but drew a parallel between behind-the-ear hearing aids, our vocal tract, and musical instruments (not to mention our ear canals… well, I just mentioned it, so I guess that I should not have said, “not to mention”…). This three-part series is based on

The Acoustics of Hearing Aids: Standing Waves- Part 1

Marshall Chasin

On May 6, 2013, an article of mine was published in the Hearing Review about the acoustics of hearing aids. This was divided into three categories- 1. standing waves, 2. damping and impedance, and 3. flared or belled tubes. While this article was about hearing aids, the acoustic principles underlie speech acoustics and also the acoustics of musical instruments- something that

A city is a noisy place

Marshall Chasin

A city is a noisy place. The Canadian Hearing Society in … Canada… (bet you couldn’t guess that one?!) has some hearing loss prevention promotional material that says that “noise levels are doubling every decade”. While this is a story that sounds alarmist and is sure to grab attention, there are some data to support it. Noise levels do change very gradually

Reconnaissance de la Parole en Classe et en Milieu de Travail

Marshall Chasin

Par le liberated learning Consortium Le Liberated Learning Consortium (Consortium Apprentissage libéré) et l’Association des malentendants canadiens utilisent la reconnaissance de la parole pour promouvoir l’accessibilité et l’indépendance. Le Consortium est un regroupement d’universités, de collèges et d’organismes sans but lucratif qui promeuvent l’apprentissage accessible par le biais de la reconnaissance de la parole. Il collabore avec l’AMEC pour offrir

Music training even improves cochlear function

Marshall Chasin

In the study of the human hearing mechanism there has been an historic tendency, rightly or wrongly, to divide the auditory system into peripheral (or “just the cochlea”) and central processing. Central processing refers to all of the manipulation of a speech or music signal by the nerves and other central “way-stations”. The central processing comes complete with neural feedback

Politics, Blues and What New Orleans Politicians Had to Say – Part 3

Marshall Chasin

Welcome to part 3 of Larry Blumenfeld’s article from Blu Note magazine. In parts 1 and 2 he discussed the rocky balance between music and politics, at least at a municipal bylaw ordinance level. Here is what Larry had to say. During a press conference at this year’s [New Orleans ]Jazz & Heritage Festival, shortly after the city council passed

Blues, politics, and music – part 2

Marshall Chasin

In part 1 of this three-part blog, Larry Blumenfeld discusses in Blu Note magazine the politics and the culture surrounding the finding of a common ground for musicians, music lovers, and residents in New Orleans. In Part 2 Larry discusses some key areas of interest. Comprehensive Zoning Ordinance (CZO): In the 1970s, the city passed a zoning ordinance that actually prohibits live entertainment in

New Orleans, Blues, and Politics- part 1

Marshall Chasin

New Orleans is a hotbed of music, especially jazz and blues. Since the early 1970s there has been an uneasy truce between the musicians (especially in the French Quarter) and the residents regarding acceptable levels of noise or music. Recently, as has been reported, this truce broke down when one group began arguing for reducing the maximum permitted noise level

Quitter la Maison pour l’université ou le Collège… Avec un Handicap

Marshall Chasin

par Andrea Scott Votre adolescente ou adolescent envisage-t-il de quitter le nid pour fréquenter l’université ou le collège? Pour de nombreux parents, c’est une nouvelle source d’inquiétudes et d’anxiétés. D’une certaine façon, peut-être êtes-vous impatients de voir votre adolescent partir. Mais il est probable que vous vous inquiétiez de la façon dont il se débrouillera sans vous pour le protéger.

Should we use #13 tubing in in-ear monitors?

Marshall Chasin

Once upon a time (actually a month ago), I had a client who wanted to get custom silicon earplugs for his in-ear monitors. Of the many “connectors” for in-ear monitors, the most common is a stem that is on the order of 2.5 mm in diameter and extends about 8-10 mm in length. There is no magic in these numbers,