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.

Bruit : le Dangereux Polluant Que Nous Devons Freiner

Marshall Chasin

De Listen/Ecoute Par Arline L. Bronzaft Le fait que les sons et les bruits forts peuvent causer une déficience auditive est généralement admis, mais trop de gens sont encore exposés à des sons qui peuvent endommager leur ouïe. Le bruit qui est dérangeant est également reconnu, mais, malheureusement, il est trop souvent toléré comme un « mal nécessaire ». Toutefois,

Validating the attenuation features of musicians’ earplugs- part 3

Marshall Chasin

In parts 1 and 2 of this blog, issues of stimulus level and inherent variability were discussed. Variability and measurement error were found to be more of an issue of approach, and had nothing to do with whether the assessment was performed at a level that is characteristic of music, or industrial noise. 15 or the vast majority of industrial

Validating the attenuation features of musicians’ earplugs: Part 2

Marshall Chasin

Internal machinery noise levels are probably one of the most ignored aspects of any testing paradigm. In the most-simplest of cases- sound field audiometry- internal noise is governed by the environmental noise level in the audiometric test booth. For very low frequency sounds, the audiometric test booth attenuation ability is quite limited. One would need a wall diameter in excess

#2 Oui à l’Ouïe: À l’Avant-scene de la Prévention de la Perte d’Audition Due du Bruit

Marshall Chasin

Par Gael Hannan Le fondement du Programme: Parler avec les enfants, non pas leur parler Fondamentalement, l’approche Oui à l’ouïe est une conversation sur la façon dont les jeunes peuvent « Ménager leurs oreilles pour la musique ». Gael déclare, « Tous les jeunes ont à coeur d’écouter la musique – et la perspective pour eux de ne plus pouvoir

Validating the attenuation features of musicians’ earplugs- part 1

Marshall Chasin

Musicians’ earplugs, also known as the ER-15, have been available since 1988. These were based on a patent by Elmer Carlson of Knowles Electronics in the 1970s. When Mead Killion left Knowles to start his own company, Etymotic Research , he licensed from Knowles, and later developed this product. To date, over one and a half million pairs have been sold

On the Science of Audiology from a Client’s Perspective- part 2

Marshall Chasin

Charles Mokotoff is an audiologist’s worst nightmare and an audiologist’s greatest teacher. Charles is a hard-of-hearing musician who is as at home with computers as he is with his six-stringed classical guitar. The points that Charles makes with respect to changes in fitting algorithms and to speed up technology so that modern hearing aids can take advantage of apps have

On the Science of Audiology from a Client Perspective – Part 1

Marshall Chasin

For this two part blog entry, I have asked Charles Mokotoff to chime in. Charles holds Bachelor’s and Master’s degrees in guitar performance from Syracuse University and Ithaca College, respectively. He has served on the faculties of numerous colleges and universities in New York and the New England area as a lecturer in classical guitar and lute. Prior to settling

#1- Oui à ’Ouïe : À l’Avant-scene de la Prévention de la Perte d’Audition due au Bruit

Marshall Chasin

Par Gael Hannan Gael Hannan animait le groupe d’élèves du primaire entassés dans une salle de classe mobile à Yellowknife. C’était en automne 2007 et Gael, gestionnaire de programme au service de la Fondation canadienne de l’Ouïe, s’y trouvait pour apprendre aux élèves comment écouter en sécurité et prévenir la perte d’audition due au bruit. Les élèves réagissaient bien tandis

Part 2- The two most important numbers in Audiology are…

Marshall Chasin

… 1.414 and 1.059… Part 2 of this blog is about 1.059 We saw (in part 1) that 1.414 and 1.059 are approximations of irrational numbers like π, and, like π, are both quite important. If you haven’t guessed, this is about geometric means (and arithmetic means), which are important for both the audiogram and for the calculation of the frequency of

Part 1- The two most important numbers in Audiology are….

Marshall Chasin

You guessed it! … 1.414 and 1.059… These are both irrational numbers like π, and like π are both quite important. I recall my mother telling me bedtime stories about 1.414 and 1.059, although 1.059 understandably would cause nightmares. If you haven’t guessed, this is about geometric means (and arithmetic means), and this is important for both the audiogram and