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Portable music players- preferred sound levels and listening habits

Portable music players- preferred sound levels and listening habits. Kim R Kähäri Ph. D, Audiologist The Linneaus Centre HEAD and the institute for Disability Research, Örebro University & The Inst. for Neuroscience and Physiology Göteborg University, Sweden kim.kahari@neuro.gu.se.

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Portable music players- preferred sound levels and listening habits

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  1. Portable music players- preferred sound levels and listening habits Kim R Kähäri Ph. D, Audiologist The Linneaus Centre HEAD and the institute for Disability Research, Örebro University & The Inst. for Neuroscience and Physiology Göteborg University, Sweden kim.kahari@neuro.gu.se

  2. Background Childrens leisure time activities and sound exposure Pilot studies done Pilot I: Stockholm Central Station 33 yrs Pilot II: Stockholm Culture House 16 yrs Ongoing studies Kids 9 years Adolescents 17 years Structure

  3. ”The leisure habit study” 2005,in Göteborg, Sweden % of 41 754 girls and boys who listens to music > 3 times per week

  4. What sound levels are our children exposed to? (Freestyles CD’s & Mp3’s) LAeq= 83-89 dB (Hodgetts, Rieger & Szarko, 2007) and110 dB A in earcanal with probemichrophone LAeq= 80 dB (Williams, 2005) 139 dB SPL Max out 9 cd´s (Fligor & Cox 2004) dB= 91-121 LAeq (corrected för FF) +7-9 dB A with canalphones LAeq= 97 dB (Hellström, 2001) LAeq= 82 dB (Airo, Pekkarinen % Olkinuora, 1996) LAeq= 83.4 dB (Rice, Breslin & Roper, 1987)

  5. Noise induced threshold shift (Niskar A. et al 2001) 6-11 yrs 8.5% 12-19 15.5% Constant Tinnitus (Widen SE, Erlandsson, 2004) 16-17 yrs 6.8-10.3 18-19 yrs 14.0-19.7 Often/always tinnitus (K-M Holgers 2001) 9-16 yrs 16% 3 reference studies

  6. Pilot I Pilot II n= 60 41 sex 19 w /41 men 23 w/18 men age= 33 (SD=13.2) 16 (SD= 1.5) Listening durance 11 yrs 4 yrs Questionnaires 60 41 SLM* 60 41 Valid measurm. 41 38 SLM* = Sound level measurements Pilots done, Örebro Univ.

  7. Stockholm Central Station

  8. Pilot I N= 60 Pilot II N= 41 Mean=33 yrs Mean= 16 yrs

  9. I: Stockholm Central Station, 33 yrs (n=41) average dB LAeq,FF,60sec = 83 (73.4 -101.8) average LA,FF max, 60sec = 88.5 (76.5 -107.4) II: Stockholm Culture House, 16 yrs (n=40) average dB LAeq,FF,60sec = 81.1 (57.9 - 99.1) average LA,FF max, 60sec = 85.2 (63.2 -103.9) Pilots done, cont.

  10. Planned: N=500 Pure tone hearing thresholds Tests: Tympanometry Otoacoustic emissions DPOAE, SOA Questionnaire: Hearing and music listening habits 2009-2010: Ongoing Study IKids, 9 years

  11. 5.4% Show a SNITS*: (N=8/144 with normal compliance test) (8.5% reference material 6-11 yrs, Niskar et al 2001) 5 % have tinnitus on daily/always basis (16% often/always constant reference material 9-16 yrs, Holgers 2001 (6.8-10.3% reference material 16-17 yrs, Widen, Erlandsson 2004) 62 % uses head phones/ Mp3’s when listening to music 9 % uses head phones/ Mp3’s on daily basis *SNITS: Suspected Noise induced threshold shift. Kids, 9 yrsSome preliminary results N=102

  12. 2009-2010 Ongoing Study II Adolescents, 17 yrs. Questionnaire: Hearing and PMP listening habits to normal hearing & young hard of hearing A sample of 80 students to test: Pure tone hearing thresholds Tests: Tympanometry Otoacoustic emissions DPOAE, SOA Questionnaires: Hearing and PMP habits /music listening Youth Attitude to Noise Scale (Widen Olsen S. 2004) Sound level measurements: of PMP in laboratorie using KEMAR

  13. Adolescents 17 years, preliminary results 329 normal hearing 68 hard of hearing 60 has been tested in lab (both normal hearing & hard of h 52 % are frequent users (daily), most use 75% of max volume Typical activity when listening: Transportation (on bus, train, bicycle when walking) Ongoing Study II

  14. 1) We can acknowledge the risk for future hearing damages 2) Consumer- friendly technique! Zero tolerance! Safe sound level limits, especially for childrens’ products. Spread knowledge to create awareness about risks Message

  15. Portable Music Players - Preferred Sound Levels and Listening Habits, Among Adults Kim R. Kähäri, T. Åslund, J. Olsson, 2010, submitted 2.Portable Music Players - Preferred Sound Levels and Listening Habits, Among Adolescents Kim R. Kähäri, T. Åslund, J. Olsson, 2010, on it’s way… 3. Hopefully this fall, 2010 4. Hopefully this fall, 2010 Noise and Health, 2010

  16. The team Carina Wikström – Audiologist Tobias Åslund - Sound Engineer Johannes Olsson - Sound Engineer Jenny Engelbrektsson – Audiologist Johanna Pernhall Breder – Audiologist AMMOT- The Soundheroes Acknowledgements Prof. Claes Möller, Audiological Research Center in Örebro FAS Hearing Center/CKV Karolinska Institutet, Stockholm The Swedish Association of Hard of Hearing People

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