Every attenuation figure on this website traces back to a test report we can send you. Below are the certificates, the laboratory that produced the data, and the report number for each model.
Where our attenuation data comes from
Our earmuffs are tested by Michael & Associates, Inc. (State College, Pennsylvania, USA) — an independent laboratory accredited under the US National Institute of Standards and Technology National Voluntary Laboratory Accreditation Program (NVLAP Lab Code 100427-0), meeting the requirements of ISO 17025.
Accreditation covers EN 352 parts 1–10, ANSI S3.19-1974, ANSI S12.6-2016, ANSI S12.42-2010, and AS/NZS 1270:2002.
Testing follows the real-ear attenuation at threshold (REAT) method with 16 normally-hearing subjects across 7 test frequencies, as required by the standard. Reports include mean and standard deviation values.
Laboratory-derived attenuation data is provided for comparison purposes. Actual protection in field use depends on fit, wearing time and condition of the product.
Measurement uncertainty stated by the laboratory
| Parameter | Uncertainty |
|---|---|
| Weight | ± 0.3 g |
| Headband force | ± 0.45 N |
| Cushion pressure | ± 250 Pa |
| Insertion loss | ± 2 dB |
| REAT attenuation | ± 3 dB |
Passive earmuffs — test reports
| Model | Wearing style | Standard | Attenuation | Report |
|---|---|---|---|---|
| S3 | Headband, metal-core | EN 352-1:2020 | SNR 36 dB | On request |
| S3H | Helmet-mounted | EN 352-3:2020 | SNR 36 dB | Q9080A |
| S2H | Helmet-mounted | EN 352-3:2020 | SNR 32 dB | Q9166A |
| T3H | Helmet-mounted, dielectric | EN 352-3:2020 | SNR 36 dB | Q9080A* |
| T2H | Helmet-mounted, dielectric | EN 352-3:2020 | SNR 32 dB | Q9166A* |
* T-series are dielectric versions built on the same acoustic platform as the corresponding S-series model; attenuation data is derived from the S-series report.
Electronic and communication earmuffs — test reports
All electronic and communication models below are built on the same acoustic shell, and therefore share the same hearing-protection test reports.
| Platform | Wearing style | Standard | Attenuation | Report |
|---|---|---|---|---|
| MT500 / MG700 COM / MG700 Pro / MG700 Mesh | Headband | EN 352-1:2020; EN 352-4; EN 352-6; EN 352-8 | SNR 32 dB | Q7821A |
| MT500 / MG700 COM / MG700 Pro / MG700 Mesh | Helmet-mounted | EN 352-3:2020; EN 352-4; EN 352-6; EN 352-8 | SNR 30 dB | Q7822A |
Both reports dated 12 December 2022. The laboratory describes the test item as an electronic muff-type hearing protector, which covers the shared shell across this product family.
Communication configuration by model
| Model | Two-way radio (PMR / DMR) | Bluetooth | Mesh full-duplex |
|---|---|---|---|
| MT500 | — | Yes | — |
| MG700 COM | Yes | — | — |
| MG700 Pro | Yes | Yes | — |
| MG700 Mesh | — | Yes | Yes (Mesh 4.0) |
Radio and wireless conformity for communication models is certified separately from PPE. Details are provided to customers on request.
CE certification (PPE Regulation EU 2016/425)
CE certification is issued by CCQS Certification Services Ltd. (Blanchardstown, Dublin, Ireland), Notified Body No. 2834, under Regulation (EU) 2016/425 on Personal Protective Equipment.
Our certification is held under Module D — quality assurance of the production process. This means the Notified Body audits our production consistency on an ongoing basis, rather than approving a single type sample once.
| Certificate No. | Scope |
|---|---|
| CE-PC-250109-023-01-9A | S2 |
| CE-PC-250109-023-02-9A | S2H |
| CE-PC-250109-023-03-9A | S3H |
| CE-PC-230608-145-FPC-E | Overhead communication headset (505001) |
| CE-PC-230608-145-02-9B | Helmet-mount communication headset (505001) |
| CE-PC-230608-145-FPC-B | EN352 Module D |
| CE-PC-230608-145-FPC-C | EN352 Module D Updated |
Certificates are maintained under periodic surveillance by the Notified Body. Current copies are provided on request.
Quality management
| Standard | ISO 9001 |
| Certificate No. | 02926Q00219R201 |
| Issued by | Jiangsu Jiuzhou Certification Co., Ltd. |
| Valid | 3 June 2020 – 31 May 2029 |
Request a certificate or test report
We send full test reports on request under NDA where required. Tell us the model and the market you are entering, and we will send the applicable certificate, report, and declaration of conformity. Get in touch with us — email sales1@njmyat.com or hua@njmyat.com.
