Hearing Protection, Flat-Liner earmuffs offer flat attenuation for improved communication in noisy environments.

Ear Muffs, Hearing Protection

Flat-Liner™, Maximum Comfort



*FlatLiner Muff, HB-640*	*Optional storage bag, SGB-30*

Maximum Comfort

Elvex Flat-Liner was originally designed to provide flat attenuation for 500 Hz and up, but the market has shown no interest in this concept. That's why we have redesigned this product to offer a medium level of attenuation and absolutely maximum level of comfort. This is how we maximized comfort:
This earmuff is designed to address the issue of having the right protection, and maximum comfort.
Low headband force
Wide ear cushions in order to distribute the force over a larger surface area
Soft ear cushions with an expanded vinyl for a subtle feel against the skin
A soft , padded headband
Steel headband tolerates temperature extremes without losing force
26 dB NRR from certified U.S. laboratory to ANSI S3.19-1974.
32 SNR from certified European laboratory to CE EN-352-1
This earmuff may just have the right attenuation for most noise environments.

Read an article about the problem with "Overprotection".

Product Name	Product Number	Product Description	Suggested List Price
Flat-Liner	HB-640	Flat-Liner, 8.2 oz./232 g., Steel headband, 26 NRR, 32 SNR, (CE), burgundy	$19.40
Universal Ear Muff Hygiene Kit	HK-640	Hygiene Kit for HB-640	$7.55
Safety Glass Accessories	SBG-30	Storage Microfiber Bag, with drawstring, for goggles or muffs	$6.30

ANSI S3-19-1974, Dr. Michael & Associates, State College, Pennsylvania, USA

Frequency, Hz

125

250

500

1000

2000

3150

4000

6000

8000

NRR

Mean Attenuation, dB

17.8

25.0

34.0

35.8

31.9

35.9

35.2

38.3

39.2

Std. Deviation

2.4

2.9

2.6

2.9

1.6

3.0

2.4

3.5

4.1

CE EN-352-1:2002, INSPEC International, Greater Manchester, United Kingdom.

Frequency, Hz

125

250

500

1000

2000

4000

8000

SNR

Mean attenuation, dB

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

Protection

15.0

12.9

22.1

31.5

38.3

30.8

35.4

34.0

AS/NZS 1270:2002, Testing performed by Dr. Michael & Associates, State College, Pennsylvania

Frequency, Hz	125	250	500	1000	2000	4000	8000	SLC(80)
Mean Attenuation, dB	18.8	24.8	35.2	38.8	30.2	38.4	40.5	30.1 Class 5
Std. Deviation	3.8	3.5	3.7	3.2	3.4	2.8	3.0
Mean - Std. Deviation	15.0	21.3	31.5	35.6	26.8	35.6	37.5