Safe. Sound. Naturally.The ZEM is based on remarkable technology filters out harmful, high-decibel noises.
The ZEM also: - Achieves uniform sound reduction
- Filters out the most damaging sound frequencies
- Allows easy conversation without the "echo" effect found in other hearing protection devices
Other advantages include: - High speech intelligibility
- Increased safety
- Outstanding comfort and easy adjustment
- No occlusion or echo effect
- Designed for improved inner ear hygiene
- Light weight at less than 2 ounces
- Compact for easy storageEasy to use
- No batteries required
 ZEM - Specifications
| Frequency (Hz) |
125 |
250 |
500 |
1000 |
2000 |
3150 |
4000 |
6300 |
8000 |
NRR |
| Mean Attenuation (dB) |
32.5 |
34.7 |
31.4 |
33.0 |
33.4 |
39.4 |
37.6 |
37.2 |
37.0 |
26 |
| Standard Deviation (dB) |
4.3 |
4.0 |
3.2 |
2.5 |
2.6 |
4.3 |
4.0 |
4.7 |
3.7 |
|
Independently tested to ANSI S3.19-1974
Low FrequenciesThe
ZEM reduces sounds in the low frequencies (125Hz to 500 Hz) better than
most hearing protection products. These low frequency noises are the
ones that mask speech communication.
Mid-RangeThe
flat attenuation characteristics in the speech range between 500 Hz and
2000 Hz is what distinguishes the ZEM. Because sound is reduced evenly,
there is no distortion. The result is very high speech intelligibility.
High FrequenciesAttenuation increases appreciably above 2000 Hz, the most damaging frequencies to the human ear. | |
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