Tinnitus Archive

Tinnitus Archive > Data Sets > 1 > Tinnitus Test Result > Minimum Masking Levels (MMLs)

Minimum Masking Levels (MMLs)

Data Set 1: Tinnitus Data Registry, 1981 - 1994 Related Data Summaries

Overall Sample Number: 1630

Number of patients responding to this item: 1383sample subset.gif: When the sample size for the current analysis is substantially (more than 10%) smaller than the total number of patients in the database, this will appear to flag that fact.

Test Conditions:       
Masking stimulus was on same side as predominant tinnitus, if tinnitus was
lateralized; if tinnitus was not lateralized the stimulated ear was usually the
better ear. (Data shown here are for the first masking trial if patient received
more than one trial.)
MINIMUM MASKING LEVELS (MMLS)
Minimum Masking Level (dB SL) N %
0 - 3 270 19.5
4 - 6 309 22.3
7 - 9 220 15.9
10 - 12 175 12.7
13 - 15 104 7.5
16 - 18 74 5.4
19 - 21 54 3.9
22 - 24 44 3.2
25 - 27 25 1.8
28 - 30 25 1.8
More than 30 83 6.0
Total* 1383 100.0
* Omits 247 patients (15% of sample) in whom minimum masking levels could not be determined (due primarily to equipment limitations or to patients' reduced loudness tolerance).
Minimum Masking Levels (MMLs)
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