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2: Changes in otoacoustic emissions with three levels of personal stereo (PS) use and with age

 

Figure 2 A decrease in transient-evoked otoacoustic emissions indicates greater accumulated cochlear damage. Data points represent mean values and error bars indicate plus or minus 1 standard error.

 

Standard sizes for the three personal stereo use groups

Age group (years)
Personal stereo use
10-19
20-29
30-39
40-49
50-59
Total
Negligible (PS=0)
107
348
312
257
145
1169
Moderate (PS=1)
53
138
60
63
41
355
Heavy (PS=2)
61
86
37
13
3
200
Total
221
572
409
333
189
1724

©MJA 1998

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