ISOtunes PRO Aware IT-38 Guia De Inicio Rapido página 3

FIG 1
ANSI S3.19-1974 Table (NRR Table)
A1: Frequency, Hz • A2: Grand Mean Attenuation, dB
A3: Standard Deviation, dB
A1: 125 250 500 1000 2000 3150 4000 6300 8000 NRR
A2: 32.9 30.1 34.6 34.5 35.4 39.0 39.3 46.3 46.2
A3: 4.7
EN 352-2:2020 Table (SNR Table)
B1: Frequency, Hz • B2: Mf(dB) • B3: sf(dB) • B4: APVf
B1: 125 250 500 1000 2000 4000 8000
B2: 30.0 28.8 32.0 34.4 35.8 39.6 43.4
B3: 4.7
B4: 25.3 25.6 27.7 29.9 32.4 34.6 38.1
EN 352-7:2020 Level Dependent Criterion Level
C1: H 116 dB(A)
C2: M 113 dB(A)
C3: L 107 dB(A)
Note: Product not intended for use in impulse-type noise situations
3.3 5.4 4.3
3.3 4.3 4.5
3.2 3.2 3.9
3.4 5.0 5.4
26 AL
3.2 4.3
B5:
SNR=33dB
H=33dB
M=30dB
L=28dB
APVf=MF-SF (dB)
CSA