2018 AES International Conference on Music Induced Hearing Disorders
Dates: June 20-22, 2018
Location: Columbia College, Chicago, IL, USA
Wednesday, June 20, 2018
6:00pm – 9:00pm: Registration and Opening Event "Meet & Greet"
Open House and Tour of the Labs and Studios of the Department of Audio Arts & Acoustics Columbia College Chicago.
Thursday, June 21, 2018
8:00am – 9:00am: Registration; Coffee & Pastries
9:00am – 5:00pm: Paper Presentations & Panel Discussions
9:00am – 9:10am WELCOME & OPENING REMARKS
Robert Schulein – ImmersAV Technology - Schaumburg, IL, USA
9:10am – 10:00am KEYNOTE ADDRESS: "Music for Brain Health" Nina Kraus, PhD (Northwestern University, Evanston, IL)
Although it is all around us all of the time, we rarely give much thought to our invisible yet powerful companion, sound. It shapes our brains for better and worse. Learning a second language or playing a musical instrument sharpens our brains. Lack of exposure to meaningful sound and overexposure to meaningless sound blunts our brains and stunts our development. There are ways to capture the imprint that sounds leave on our nervous systems, empowering us to learn more and more about this invisible ally and enemy of brain health.
Making sense of sound engages our entire brain: there is a wide activation of sensorimotor, cognitive, and reward circuitry. Active and repeated engagement with sounds that activate all these circuits, therefore, is a route to honing our brain function. Playing music is like hitting the jackpot for the brain because it requires the motor system, deeply engages our emotions, and absolutely gives us a cognitive workout. We have employed a biological approach to reveal the integrity of sound processing in the brain and how these brain processes are shaped by music training. We have found that music works in synergistic partnerships with language skills and the ability to make sense of speech in noisy, everyday listening environments. We have found that music brings about a “speeding” of auditory system development, and a tendency toward a reversal of the biological impact of poverty-induced linguistic deprivation. The generalization from music to everyday communication illustrates both that these auditory brain mechanisms have a profound potential for plasticity and that sound processing is biologically intertwined with listening and language skills. Playing music gives the brain the tools to make sense of sound. These findings have the potential to inform health care, education, and social policy by lending a neurobiological perspective to the efficacy of music for improving auditory communication skills.
10:00am – 10:30am "Testing of Musician's Earplugs" Pieter G. van 't Hof, (Dynamic Ear Company BV, Delft, The Netherlands)
Analysis of test data received from a recent Dutch survey of Musicians universal fit earplugs and numerous EN352-2 tests of custom earpieces fitted with linear filters reveals far more than acoustic performance of the products. Data from REAT testing can be used to determine ease of use, fit and volumetric information of ear canals, providing better individual fit and performance advice for musicians. With this in mind it is proposed that a new test, based on REAT, be introduced.
10:30am – 11:00am BREAK
11:00am – 12:00pm Panel Discussion: "IEMs and Safe Sound"
Join legendary monitor engineer Mark Frink (Tony Bennett, k.d. lang, Super Bowl); Matt Engstrom of Shure; Dr. Michael Santucci, Au.D. of Sensaphonics; and Dr. Heather Malyuk, Au.D. of Soundcheck Audiology as they delve into best practices and demonstrations for creating safer in-ear monitor mixes. Learn insightful techniques for improving the in-ear experience for musicians while preserving hearing, both from the engineering and audiological perspectives.
12:00pm – 1:30pm LUNCH
1:30pm – 2:00pm "Disorders of Sound Tolerance" Marc Fagelson, PhD (East Tennessee State University; Department of Audiology and Speech Language Pathology; Johnson City, TN) and James H. Quillen (Mountain Home VA Medical Center; Johnson City, TN)
A variety of unusual and challenging auditory events may affect musicians and recording engineers, particularly when associated with perceptions of excessive loudness, pitch anomalies, aversions to specific sounds, and the sensation of pain in the ears. This presentation will review mechanisms associated with disordered sound tolerance (DST), including exposure characteristics, and the many physiologic changes that result in unusual auditory symptoms such as tinnitus, hyperacusis, diplacusis, and auditory nociception, or the sensation of pain in the ears triggered by sound. Consensus regarding terminology of symptoms of DST is lacking among hearing health care professionals; labeling schemes related to elements of DST will be reviewed. Relations between audiometric status and DST will be reviewed.
2:00pm – 2:30pm Invited Speaker: Marshall Chasin, AuD (Musicians’ Clinics of Canada, Toronto, Ontario, Canada) "Musicians and the Prevention of Hearing Loss"
Music exposure can pose a problem, especially with the advent of “portable” music. Despite the complexity of the human auditory system, it does not know the difference between industrial noise and music. Indeed, many of the factors can equally affect music exposure as well as industrial exposure. This talk is an overview of those factors affecting hearing for musicians as well as environmental strategies and hearing protection to minimize the potential damaging effects of music.
2:30pm – 3:00pm "Otoacoustic Emissions in Band Musicians with Overexposure" Sridhar Krishnamurti, PhD, K. Mecaskey, R. Thaxton, S. Peeler (Auburn University, Auburn, Alabama, USA
Otoacoustic emissions (OAEs) were recorded in participants from three groups: 1) non-band students, 2) marching band students 2) band directors. OAE results were compared across 190 ears of non-band students, 320 of band musicians, and 128 ears of band directors. There were highly significant differences between participants in terms of OAE amplitude. The greatest OAE amplitudes were found for non-band student musicians, followed by student band musicians, and the least amplitudes were found in band directors.
3:00pm – 3:30pm BREAK
3:30pm – 4:00pm Invited Talk: Sharon Kujawa, PhD (Harvard Medical School)
"Hidden Hearing Loss from Sound Overexposure"
Exposure to high-level sound can damage the sensory hair cells of the cochlea, producing overt threshold sensitivity losses revealed on the clinical audiogram. Recent studies in our laboratories have shown, however, that well before the audiogram provides evidence for this loss, a more insidious process is occurring that doesn’t kill hair cells, but instead, permanently interrupts their communication (synapses) with cochlear neurons. This cochlear synaptic loss can be dramatic, even when thresholds return to normal after exposure, where it has been called ‘hidden hearing loss.’ The injury changes the way ears and hearing age, long after the exposure has stopped, and likely contributes to difficulties hearing in more challenging listening environments, for example, in noise and reverberation. It may be an important instigator of changes that result in tinnitus, the sensation of phantom sounds, and hyperacusis, a reduced tolerance to moderate-level sounds. These sobering findings have important implications for musicians and others involved in music recording and production activities, as they are at high risk for these consequences of sound overexposure.
Work supported by grants from the National Institutes of Health (NIH/NIDCD), Department of Defense and Office of Naval Research.
4:00pm – 4:30pm "Computational Models to Predict Safety Limits for Aided Music Listening" Jon Boley, PhD (GN Advanced Science) and Earl E. Johnson (James H. Quillen VA Medical Center, Mountain Home, TN; Department of Audiology and Speech-Language Pathology, East Tennessee State University, Johnson City, TN)
At equal sound exposure levels, listeners with a pre-existing hearing loss are less vulnerable to music-induced hearing damage than listeners with no hearing loss. But such listeners require and often prefer to listen to music with additional amplification. But how much gain and to what output levels (in dB) are safe is somewhat unknown at this time. In this study, we use computational models to predict hearing threshold shifts from amplified music exposure. We estimate safe output limits and corresponding free-field exposure limits for listening to music with hearing amplification by minimizing permanent and temporary threshold shifts.
4:30pm – 5:00pm "Investigating the Use of Sound Level Management Software in Live Indoor Music Venues"
Siobhan McGinnity1,2 • Johannes Mulder3 • Elizabeth Francis Beach1,4 • Robert Cowan1,2
1 The HEARing Cooperative Research Centre, Melbourne, Australia
2 Department of Audiology & Speech Pathology, the University of Melbourne, Australia
3 Murdoch University, Perth, Australia
4 the National Acoustic Laboratories, Sydney, Australia
Risks to the hearing health of patrons and staff in the music industry have been documented for decades, yet there has been little progress in terms of effectively managing sound levels to mitigate the risk. This study aimed to investigate whether the use of sound level management software (10EaZy) could have a positive impact on the sound level exposure of patrons and staff within indoor live music venues of the City of Melbourne. The study included surveys of patrons and staff, which asked about hearing health, use of hearing protection and their impression of the sound levels within the venue.
6:00pm – 6:30pm Hor D’Oeuvres
6:30pm – 8:30pm Dinner, Catered by Goddess and the Grocer
9:00pm Performance by Glass Mountain with a very special ImmersAV Technology experience
Friday, June 22, 2018
8:30am – 9:00am: Coffee & Pastries
9:00am – 2:10pm: Paper Presentations & Panel Discussions
9:00am – 9:30am "Hidden Hearing Loss: Effects of Recreational Noise on Evoked Potential Amplitude and Other Auditory Test Metrics" Colleen Le Prell, PhD (The Univeristy of Texas at Dallas) and Christopher Spankovich (University of Mississippi Medical Center, Jackson, Mississippi)
Our recent studies assessing young-adult college student cohorts from diverse geographic regions have failed to detect statistically significant relationships between various audiometric measures and self-reported recreational noise exposure history. All studies collected retrospective cross-sectional data; in addition, a subset of subjects were followed prospectively to assess potential auditory effects of new loud recreational activities. Testing has included tympanometry, pure-tone detection thresholds, word-in-noise identification tests, distortion product otoacoustic emission (DPOAE) amplitude, and auditory brainstem response (ABR) amplitude measurements. There have been no reliable relationships between self-reported recreational noise history and auditory function in young adult populations from Nashville (Tennessee), Gainesville (Florida), and Dallas (Texas). In a single study assessing changes in function following loud recreational event exposures, temporary word-in-noise deficits were detected as a function of increasing noise exposure dose, but ABR amplitude was unchanged. Taken together, temporary changes in function have largely been restricted to changes on the word-in-noise test and no permanent deficits have been observed in association with recreational sound exposure.
9:30am – 10:00am Invited Speaker: Marshall Chasin, AuD (Musicians' Clinics of Canada, Toronto, Ontario, Canada) "Music & Hearing Aids"
Given the limitations of most modern digital hearing aids to handle the more intense inputs that are characteristic of many forms of music, there are a number of clinical strategies and technologies that an audiologist may use to alter the electro-acoustic characteristics of hearing aids that otherwise work quite well for their clientele for speech.
10:00am – 10:30am Invited Speaker: Cory Portnuff, AuD, PhD (University of Colorado Denver School of Medicine) "Best Practices for Fitting, Dispensing and Verifying Hearing Protection Devices for Musicians"
Several types of hearing protection devices (HPDs) are marketed to musicians. Some types, theoretically, provide better sound quality which is more desirable to a musician. Unfortunately, there is presently little guidance on choosing appropriate HPDs for musicians and on clinical methods of measuring attenuation of HPDs. This paper reports on study data evaluating different procedures for HPD measurement to determine the most effective and efficient clinical verification protocols using several different methods. This paper discusses recommendations and best use of these in clinical practice derived from this data. The paper then presents a series of best practices for audiologists in choosing, fitting, dispensing, and verifying hearing protection for musicians.
10:30am – 11:00am BREAK
11:00am – 11:30am Panel Discussion: "Many Ounces of Prevention Where There IS No Pound of Cure"
A panel discussion addressing teaching strategies for hearing awareness and conservation, moderated by Benj Kanters of HearTomorrow.Org. Panelists will include Marshall Chasin of the Musicians’ Clinic of Canada, Heather Malyuk of Soundcheck Audiology, Siobhan McGinnity of The HEARing CRC, and Joel Styzens of relax-your-ears.com. Attendees will hear discussion of many strategies for teaching awareness and conservation; strategies that will vary depending upon the needs and limitations of musicians, sound engineers, audiologists or the general public.
12:00pm – 1:30pm LUNCH
1:30pm – 2:00pm Invited Speaker: Elizabeth Beach, PhD (National Acoustic Laboratories), Johannes Mulder (Murdoch University, Perth, Australia) and Ian O’Brian (Queensland Conservatorium of Music, Griffith University, Brisbane, Australia) "Development of Guidelines for Protecting the Hearing of Patrons at Music Venues: Practicalities, Pitfalls and Making Progress"
This paper will describe the efforts of an Australian-based multidisciplinary working group to develop guidelines for protecting the hearing of patrons at music venues. As a starting point, the group considered the various European standards and regulations that require venue operators to limit the sound levels emitted at venues, provide hearing protection, information for patrons, and sound level monitoring. Following an iterative drafting process which incorporated feedback from group members, a consensus document was produced which included agreed requirements relating to hearing protection, information for patrons, and sound level monitoring. The most challenging aspect was reaching agreement on sound level limits, where a number of different views needed to be accommodated.
2:00pm – 2:30pm "The Lantos 3D Scanning System and Computer Aided Design of Musicians Earplugs" Brian Fligor, Ph.D., PASC (Lantos Technologies)
Musicians EarplugsTM (MEPs) are custom-fitted passive hearing protection devices that are intended to maintain the relative loudness of sound across frequencies, while providing a modest amount of attenuation. To achieve the intended performance, the earplug must be sufficiently long (past the ear canal’s 2nd bend) and the earplug’s hollow sound bore must have acoustic mass that falls within manufacturer specifications. Herein, we report the performance of MEPs made from Lantos ear scans and digitally manufactured to correct acoustic specifications for a cohort of ears. Data showing the uniformity of attenuation and occlusion effect magnitude will be presented for earplugs manufactured to specification, as well as earplugs purposely deviating from specification, to demonstrate the control in the manufacturing process.
2:30pm – 2:40pm CLOSING REMARKS
Michael Santucci (Sensaphonics Hearing Conservation, Chicago, IL)
8:00pm Informal Social Event (TBD)