Noise reduction, Noise reduction rating, Attenuation – Etymotic HD•Safety™ Earplugs + Earphones User Manual
Page 9: Hd5 with foam eartip epa, Hd5 with 3-flange eartip epa
Noise Reduction
8
Noise
Reduction
Rating
DECIBELS
27
(WHEN USED AS DIRECTED)
THE RANGE OF NOISE REDUCTION RATINGS
FOR EXISTING HEARING PROTECTORS
IS APPROXIMATELY 0 TO 30
(HIGHER NUMBERS DENOTE GREATER EFFECTIVENESS)
ETYMOTIC RESEARCH, INC.
ELK GROVE VILLAGE, IL 60007
LABEL REQUIRED BY
U.S. E.P.A. REGULATION
40 CFR Part 211, Subpart B.
Federal law prohibits
removal of this label
prior to purchase.
HD5 with Foam eartip
EPA
Frequency in Hz
63
125 250 500 1000 2000 4000 8000
Mean Attenuation in dB 26.9 27.8 26.8 27.3 29.6 35.8 42.6 42.1
Standard Deviation in dB 4.8 4.8 5.1 6.0 6.5 3.8 2.7 4.9
APV in dB
22.1 22.9 21.6 21.3 23.1 32.0 39.9 37.3
SNR = 28 dB, H = 31 dB, M = 24 dB, L = 23 dB
Noise
Reduction
Rating
DECIBELS
27
(WHEN USED AS DIRECTED)
THE RANGE OF NOISE REDUCTION RATINGS
FOR EXISTING HEARING PROTECTORS
IS APPROXIMATELY 0 TO 30
(HIGHER NUMBERS DENOTE GREATER EFFECTIVENESS)
ETYMOTIC RESEARCH, INC.
ELK GROVE VILLAGE, IL 60007
LABEL REQUIRED BY
U.S. E.P.A. REGULATION
40 CFR Part 211, Subpart B.
Federal law prohibits
removal of this label
prior to purchase.
HD5 with Foam eartip
EPA
Attenuation
Foam Eartips
Noise
Reduction
Rating
DECIBELS
22
(WHEN USED AS DIRECTED)
THE RANGE OF NOISE REDUCTION RATINGS
FOR EXISTING HEARING PROTECTORS
IS APPROXIMATELY 0 TO 30
(HIGHER NUMBERS DENOTE GREATER EFFECTIVENESS)
ETYMOTIC RESEARCH, INC.
ELK GROVE VILLAGE, IL 60007
LABEL REQUIRED BY
U.S. E.P.A. REGULATION
40 CFR Part 211, Subpart B.
Federal law prohibits
removal of this label
prior to purchase.
HD5 with 3-Flange eartip
EPA
Frequency in Hz
63
125 250 500 1000 2000 4000 8000
Mean Attenuation in dB 26.8 28.3 28.4 27.6 31.1 33.0 32.1 39.5
Standard Deviation in dB 7.2 7.7 7.1 7.5 6.7 4.6 6.5 7.4
APV in dB
19.6 20.6 21.3 20.2 24.4 28.4 25.7 32.1
SNR = 27 dB, H = 27 dB, M = 24 dB, L = 22 dB
Noise
Reduction
Rating
DECIBELS
22
(WHEN USED AS DIRECTED)
THE RANGE OF NOISE REDUCTION RATINGS
FOR EXISTING HEARING PROTECTORS
IS APPROXIMATELY 0 TO 30
(HIGHER NUMBERS DENOTE GREATER EFFECTIVENESS)
ETYMOTIC RESEARCH, INC.
ELK GROVE VILLAGE, IL 60007
LABEL REQUIRED BY
U.S. E.P.A. REGULATION
40 CFR Part 211, Subpart B.
Federal law prohibits
removal of this label
prior to purchase.
HD5 with 3-Flange eartip
EPA
Attenuation
3-Flange Eartips