linical & experimental audiology the use of mp3 players as a possible cause of nihl wouter...
TRANSCRIPT
![Page 1: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/1.jpg)
linical & Experimental
Audiology
The use of mp3 players as a possible cause of NIHL
Wouter Dreschler ([email protected])
Academic Medical Centre, Amsterdam, The Netherlands
Jan de Laat
Leiden University Medical Centre, Leiden, The Netherlands
![Page 2: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/2.jpg)
linical & Experimental
Audiology
2
27-2-2010
Contents
1. Screening tests at the internet (www.oorcheck.nl)
2. Check of mp3-exposure at the internet (www.mp3check.nl)
3. Results in 100.000 users
4. A model for the sensitivity to MIHL
5. Conclusions
Contents
![Page 3: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/3.jpg)
linical & Experimental
Audiology
1. Website Oorcheck.nl
3
27-2-2010
Oorcheck.nl
![Page 4: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/4.jpg)
linical & Experimental
Audiology
4
27-2-2010
![Page 5: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/5.jpg)
linical & Experimental
Audiology
5
27-2-2010
![Page 6: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/6.jpg)
linical & Experimental
Audiology
6
27-2-2010
Online speech-in-noise tests
Speech-in-noise tests
Spectrum of masking noise is
equal to speech spectrum
Adjustable presentation level
Adaptive procedure
2 dB steps up-down
Fixed noise level
SRT: 50% correct recognition
Average signal-to-noise ratio
over stimuli
Oorcheck.nl
![Page 7: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/7.jpg)
linical & Experimental
Audiology
7
27-2-2010
![Page 8: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/8.jpg)
linical & Experimental
Audiology
Results as a function of age
Percentual distribution of outcome classesas a function of age
0%
20%
40%
60%
80%
100%
25 t/m 35 36 t/m 45 46 t/m 55 56 t/m 65 66 t/m 98Age decade
Poor
Insufficient
Good
Oorcheck.nl
![Page 9: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/9.jpg)
linical & Experimental
Audiology
Subjective versus objective results
Percentual distribtion of the differences between subjective and objective results
0%
20%
40%
60%
80%
100%
12 t/m 15 16 t/m 18 19 t/m 24Age category
poorer than thought
about equal
better than thought
Oorcheck.nl
![Page 10: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/10.jpg)
linical & Experimental
Audiology
2. Website mp3check.nl
10
27-2-2010
![Page 11: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/11.jpg)
linical & Experimental
Audiology
Technical measurents on HATS manikin
Tested:• >30 mp3-spelers• different earphones• four positions of the
volume wheel• different musical styles
Effects:• coding strategy almost absent• Musical style moderately strong• Mp3-player: large!• Earphone: very large !!
mp3check.nl
![Page 12: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/12.jpg)
linical & Experimental
Audiology
Average output levelsof 103 fragments, classified in 9 musical styles
mp3check.nl
![Page 13: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/13.jpg)
linical & Experimental
Audiology
Max.output per musical style and mp3 player
no
rmru
is
elec
folk
hip
ho
p
jazz
klas
siek
lati
n
po
p
r&b
rock
iPod Nano 96 94,6 93,7 95,3 93,7 88,6 94,5 93,6 89,4 92,7
Creative Muvo 102,4 100,6 100,3 101,6 100,5 95,4 101,2 100,2 96,1 99,2
Creative Zen 102,5 100,9 100,2 101,7 100,4 95,3 101,2 100,2 96,2 99,2
Sweex Bluebay 113,3 111,4 111,5 112,4 111,9 106,4 112,4 111,3 107,1 110,2
iPod Shuffle 102,2 100,5 99,8 101,5 99,7 94,9 100,6 99,7 95,7 98,8 Packard Bell Pulse 99,7 98 97,3 98,8 98,2 92,3 98,8 97,7 93,2 96,6
Philips SA3125 97,1 95,7 99,1 96,5 94,7 89,8 95,6 94,7 90,6 93,8
Samsung K3 106,5 104,5 104,3 105,7 104,2 99,6 105,1 104 100,4 103,1
Sandisk Sansa 95,4 93,7 93,3 94,6 93,9 88,2 94,5 93,4 88,9 92,3
Sony A1200 97,8 96 95,8 96,9 96,2 90,8 96,8 95,7 91,5 94,6
intensiteit per muzieksoort bij maximaal volume in dB(A)
mp3check.nl
![Page 14: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/14.jpg)
linical & Experimental
Audiology
14
27-2-2010
![Page 15: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/15.jpg)
linical & Experimental
Audiology
15
27-2-2010
![Page 16: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/16.jpg)
linical & Experimental
Audiology
16
27-2-2010
![Page 17: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/17.jpg)
linical & Experimental
Audiology
17
27-2-2010
![Page 18: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/18.jpg)
linical & Experimental
Audiology
18
27-2-2010
![Page 19: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/19.jpg)
linical & Experimental
Audiology
19
27-2-2010
![Page 20: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/20.jpg)
linical & Experimental
Audiology
20
27-2-2010
![Page 21: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/21.jpg)
linical & Experimental
Audiology
3. Results from 100.000 users
21
27-2-2010
Results mp3check.nl
![Page 22: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/22.jpg)
linical & Experimental
Audiology
Characteristics of mp3-use (n=100.000)
22
27-2-2010
22% of the users uses the upper 20% of the volume range
76% of the users listens less than 10 hours per week
Results mp3check.nl
![Page 23: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/23.jpg)
linical & Experimental
Audiology
Levels of sound exposure (n=100.000)
The output levels are > 90 dB(A) for 21% if the subjects
However, these levels may be corrected for exposure duration
• “Safe” exposure: 76% of the users[<80 dBA @ 40 h/w, <83 dBA @ 20 h/w, <86 dBA @ 10 h/w, etc.]
• “Higher exposure: 24% of the users
23
27-2-2010
Results mp3check.nl
![Page 24: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/24.jpg)
linical & Experimental
Audiology
The effects of musical style
Differences in exposure levels for different musical
styles
24
27-2-2010
Results mp3check.nl
![Page 25: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/25.jpg)
linical & Experimental
Audiology
4. A model for the sensitivity to MIHL
25
27-2-2010
Risk assessment
![Page 26: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/26.jpg)
linical & Experimental
Audiology
Hypotheses in risk assessment
MIHL = NIHL• Levels > 75 dBA may contribute to damage
• Exchange rate: 3 dB
• Exposure calculated re. 40 hours/week
Adapted risk model• MIHL after 10 years of use
• Focus on HTL234
< 5 dB: safe (green) 5-10 dB: marginal (orange) > 10 dB: unsafe (red)
Predictions based on ISO-1999 (P50)
Risk assessment
![Page 27: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/27.jpg)
linical & Experimental
Audiology
Not just the output level !!
0
1
2
3
4
5
6
7
8
75 80 85 90 95 100 105 110 115
Gemiddeld geluidsniveau in dBA
blo
ots
telli
ng
sd
uu
r in
(u
ren
)kans op blijvende gehoorschade
large
change
moderate
change
Very small
change
Change for permanent NIHL
Risk assessment
![Page 28: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/28.jpg)
linical & Experimental
Audiology
28
27-2-2010
![Page 29: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/29.jpg)
linical & Experimental
Audiology
29
27-2-2010
![Page 30: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/30.jpg)
linical & Experimental
Audiology
30
27-2-2010
![Page 31: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/31.jpg)
linical & Experimental
Audiology
5 Conclusions
31
27-2-2010
Conclusions
![Page 32: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/32.jpg)
linical & Experimental
Audiology
Conclusions
Unexpectedly, about 20-30% of young subjects have
deteriorated hearing for speech in noise
MIHL is a possible cause
Mp3 players form a non-neglible part of the sound
exposure in youngsters
Therefore, there is need for action
• Limitation of max. Output levels (as in the EU)?
• Counseling and awareness
• Large-scale screening with a test sensitive for MIHL
Conclusions
![Page 33: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/33.jpg)
linical & Experimental
Audiology
33
Thanks for your
attention
Questions?
![Page 34: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/34.jpg)
linical & Experimental
Audiology
Thanks for your attention
34
27-2-2010
![Page 35: Linical & Experimental Audiology The use of mp3 players as a possible cause of NIHL Wouter Dreschler (w.a.dreschler@amc.nl)w.a.dreschler@amc.nl Academic](https://reader038.vdocuments.us/reader038/viewer/2022110213/5697bfab1a28abf838c9acc9/html5/thumbnails/35.jpg)
linical & Experimental
Audiology
Results as a function of age
Percentual distribution of outcome classesin younger subjects
0%
20%
40%
60%
80%
100%
12 t/m 15 16 t/m 18 19 t/m 24
Poor
Insufficient
Good
Oorcheck.nl