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UltraSonic™ high performance ear muffs
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| UltraSonic, HB-650 |
Optional storage bag, SGB-30 |
Elvex UltraSonic earmuff is our newest high performance earmuff with a
Noise Reduction Rating of 29 dB. This earmuff has been designed to provide
excellent full spectrum attenuation, as well as superb low frequency
attenuation. Ultrasonic uses a fork style headband for even distribution of the
pressure, and improved balance required for extra deep ear cups.
 29 dB NRR
from certified US laboratory ANSI S3.19-1974
- 34 dB SNR
as tested by certified European laboratory to CE EN-352-1
- Superb full
spectrum and low frequency attenuation
- Extra wide
ear cushions for highest comfort
- Soft padded
headband with low force
- Steel
headband tolerates temperature extremes
- Solid
construction
- You get the
ultimate performance and comfort with this muff
- Suggested
resale is $18.30. Foldable model, HB-550, is $19.90.
 UltraSonic Foldable, HB-550
- HB-650
UltraSonic high performance muff, 29 dB NRR, 34 dB SNR,
$18.30
- HB-550
UltraSonic Foldable high performance muff, 27 dB NRR, $19.90
- HK-650
Hygiene kit, ear cushions and foam absorbers, $7.50
- SGB-30
Storage micro-fiber bag, fits all ear muffs, $4.00
HB-650: ANSI S3-19-1974, Dr. Michael & Associates, State College,
Pennsylvania, USA
| Frequency, Hz |
125 |
250 |
500 |
1000 |
2000 |
3150 |
4000 |
6000 |
8000 |
H |
M |
L |
NRR |
| Mean Attenuation, dB |
22.1 |
27.9 |
34.9 |
35.8 |
37.3 |
41.4 |
42.3 |
41.6 |
41.2 |
37 |
33 |
27 |
29 |
| Std. Deviation |
2.9 |
2.8 |
3.4 |
2.0 |
2.5 |
2.7 |
2.8 |
3.1 |
3.7 |
HB-650: CE EN-352-1:2002, INSPEC International, Greater Manchester, United
Kingdom.
| Frequency, Hz |
63 |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
H |
M |
L |
SNR |
| Mean attenuation, dB |
19.3 |
19.3 |
26.1 |
34.0 |
39.6 |
35.1 |
43.5 |
38.9 |
35 |
32 |
24 |
34 |
| Std. Deviation |
3.8 |
2.7 |
2.8 |
2.6 |
3.2 |
3.0 |
2.9 |
5.2 |
| Protection |
15.5 |
16.6 |
23.3 |
31.4 |
36.4 |
32.1 |
40.6 |
33.7 |
HB-650: AS/NZS 1270:2002, Testing by Dr. Michael &
Associates, State College, Pennsylvania
| Frequency, Hz |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
SLC(80) |
| Mean Attenuation, dB |
21.4 |
26.7 |
35.6 |
35.6 |
31.4 |
42.8 |
42.1 |
-
31.8
- Class 5
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| Std. Deviation |
2.8 |
2.3 |
3.8 |
3.2 |
2.5 |
3.8 |
2.9 |
| Mean - Std. Deviation |
18.6 |
24.4 |
31.8 |
32.4 |
28.9 |
39.0 |
39.2 |
HB-550: ANSI S3-19-1974, Dr. Michael & Associates, State College,
Pennsylvania, USA
| Frequency, Hz |
125 |
250 |
500 |
1000 |
2000 |
3150 |
4000 |
6000 |
8000 |
H |
M |
L |
NRR |
| Mean Attenuation, dB |
19.7 |
24.6 |
33.1 |
36.8 |
32.0 |
38.6 |
41.5 |
41.8 |
41.3 |
33 |
31 |
25 |
27 |
| Std. Deviation |
2.5 |
2.3 |
2.9 |
2.2 |
1.9 |
3.1 |
3.8 |
4.0 |
4.7 |
Download single four page brochure.
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