2 of 4
TEST RESULTS
Table 2 summarizes the results of the intelligibility testing. Sample results are also shown in the bar
graphs, below.
System
Noise
Reduction
Setting
Low Noise
<25dBA
Medium Noise
(70dBA)
High Noise
(80dBA)
3M™ C1060
(Analog)
Off 0.86 0.55 0.26
Competitive
Digital
Off 0.84 0.58 0.28
3M™ C1060
(Analog)
On (-6dB) 0.76 0.69 0.49
Competitive
Digital
On (-6dB) 0.82 0.71 0.46
Table 2: Speech Intelligibility Index (STI) Test Results, Inbound
The relationship between reported STI scores and “subjective evaluation” can be described as shown in
Table 1.
Low Background Noise
(<25dBA)
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
3M Competitive Digital
3M
TM
System, Model C1060 without Noise Reduction,
Competitive Digital System with Noise Reduction, per
out-of-box configurations.
Based upon test performed by independent laboratory
with limited sample.
Excellent
Good
3M is a trademark of 3M
Company.
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