Welch Allyn 35900-NP-TE, Инструкция по применению

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Appendix E: Configurations and test protocols
DPOAE screener
Note
The protocols included are DP 4s (default) and DP 2s.
Protocol
Name
# of
Frequencies
F2 Frequency L1/L2 Averaging Time
(max)
Pass
SNR
# Passing
Frequency for
Test Pass
DP 4s 4 2.0, 3.0, 4.0, 5.0
kHz
65/55 4 seconds 6 dB 3
DP 2s 4 65/55 2 seconds 6 dB 3
Note
The DPOAE protocols differ in the amount of averaging time per frequency.
The DP 4s protocol is the default. This averaging time is the time the
screener uses to render a decision on that frequency. The DP 2s (2 second)
protocol uses 2 seconds per frequency and results in faster test times at a
minimum of 8 seconds. However, it may increase the false referral rate.
The DP 4s (4 second) protocol uses 4 seconds averaging time per
frequency and results in slower test time at a minimum of 16 seconds per
tes. However, it may reduce the false referral rate.
TEOAE screener
Note The protocols included are TE 64s (default) and TE 32s.
Protocol
Name
# of
Frequency
Bands
Frequency Center
Bands
Averaging Time
(max)
Pass SNR # Passing
Frequency for Test
Pass
DP 4s 6 1.5, 2.0, 2.5, 3.0, 3.5,
4.0 kHz
32 seconds 4 dB 3
DP 2s 6 1.5, 2.0, 2.5, 3.0, 3.5,
4.0 kHz
64 seconds 4 dB 3
Note The TEOAE protocols differ in the maximum amount of averaging time per
test. The TE 64s protocol is the default. The test will stop after 64 seconds
have elapsed if a pass or refer result is not obtained. The test may
complete in only a few seconds in cases where the OAE is robust and
noise levels are low. The TE 32s protocol will stop after 32 seconds have
elapsed if a pass or refer result is not obtained.
Directions for use Appendices 63