Page 11 - FT EAR PROTECTION

SAFETY EAR MUFF

Ideal choice for night time work, construction, airports and public works environments! AV-HB640 has Hi-
Viz color where an increase in visibility is required and maximizes speech communication.

AV-HB640:
Features AV-HB640 | Art. No: 2536AV411
• Ultra-Lightweight Ear Muffs - weighs only 8.2 oz.
or (232g)
• 20% Lower Headband Pressure provides highest
level of all-day comfort
• Maximizes speech communication in moderate
noise environments
• Extra wide ear cushions and a soft padded head
cushion for added comfort
• Low force, fork-type stainless steel headband offers
the lowest and most consistent pressure on the
wearer’s head at all temperatures
• Color: Hi-viz yellow ear cup, Black volume ring,
other components black
• Weight: 216 g (7.6 oz.)
• Dimensions: 140mm long (at rest) x 96mm wide EAR PROTECTION
x 214mm high (fully extended)

Standard
• ANSI S12.6, ANSI S3.19, and CE EN-352-1
• 32 dB SNR (CE)
• 27 dB NRR (ANSI)

ATTENUATION PROPERTIES OF AV-HB35 EAR MUFFS

• ANSI S3.19

Frequency, Hz 125 250 500 1000 2000 3150 4000 6000 8000 H M L NRR
dB Mean Attenuation 17.8 25.0 34.0 35.8 31.9 35.9 35.2 38.3 39.2
32 29 23 27
Std. Deviation 2.4 2.9 2.6 2.9 1.6 3.0 2.4 3.5 4.1

• CE EN352-1
Frequency, Hz 63 125 250 500 1000 2000 4000 8000 H M L SNR
dB Mean Attenuation 18.1 15.7 24.4 34.8 41.1 33.0 38.4 37.4
Std. Deviation 3.1 2.8 2.3 3.3 2.8 2.2 3.0 3.4 33 30 21 32
Protection, dB 15.0 12.9 22.1 31.5 38.3 30.8 35.4 34.0

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