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FIG 1 FIG 2
ANSI S3.19-1974 Table (NRR Table)
Short Eartips
Tall Eartips
EN352-2:2020 Table (SNR Table)
Short Eartips
Tall Eartips
FIG 3 FIG 4
Silicone Eartips
Frequency, Hz
125 250 500
Grand Mean Attenuation 30.1 32.8 36.2
Standard Deviation
3.2 4.4 3.7
Criterion Levels
Bluetooth (HFP)
®
Bluetooth (A2DP)
®
1000 2000 3150 4000 6300 8000
33.4 32.5 34.4 39.0 38.4 38.4
3.7 3.6 4.3 3.9 4.4 4.1
NRR CSA
25 BL