Interacoustics Sera - Sera operation and button overview; The Sera screen format

D-0114042-D – 2020/03
Sera™ - Additional Information Page 27
Stimulus tolerance:
Ratio f
2
/f
1:
Noise rejection level:
Max test time:
DP detection criteria
Min DP level:
SNR:
DP reliability:
DP stability:
# frequencies for a pass:
±7 dB
1.22
30 dB SPL
60 seconds
-5 dB SPL
6 dB
98.3%
±2 dB
3 / 4
D04 2-5 kHz, 60_50 dB SPL,
IEC
7
Test frequencies(f
2
):
Stimulus level (L1/L2):
Stimulus tolerance:
Ratio f
2
/f
1:
Noise rejection level:
Max test time:
DP detection criteria
Min DP level:
SNR:
DP reliability:
DP stability:
# frequencies for a pass:
2, 3, 4, 5 kHz
60/50 dB SPL
±7 dB
1.22
30 dB SPL
60 seconds
-5 dB SPL
6 dB
98.3%
±2 dB
3 / 4
> 99.6%
D05 1.5-6kHz, 3_6, SNR 7 dB
Test frequencies(f
2
):
Stimulus level (L1/L2):
Stimulus tolerance:
Ratio f
2
/f
1:
Noise rejection level:
Max test time:
DP detection criteria
Min DP level:
SNR:
DP reliability:
DP stability:
# frequencies for a pass:
1.5, 2, 3, 4, 5, 6 kHz
65/55 dB SPL
±7 dB
1.22
30 dB SPL
60 seconds
-5 dB SPL
7 dB
98.3%
±2 dB
3 / 6
> 99.6%
7
The Sera
TM
with DPOAE uses an improved method of stimuli level control, which more accurately delivers the specified
intensity in the full range of ear canals, from infants to adults. The applicability of the IEC 60645-6 standard is currently
limited to adult ears. Therefore, in order to better serve a market with a product that provides more accurate stimulus
levels to a wide range of ear canal volumes (specifically infants), we have elected to utilize a more comprehensive
calibration procedure for DPOAEs that is outside the scope of IEC 60645-6 for some protocols.
All DPOAE protocols that include IEC in the name use the specified IEC calibration method.