3M™ Peltor Optime III H540B Neckband Ear Defenders

Manufacturer: 3M™

• 3M Peltor Optime III is a super-muff which has been developed for use in extremely noisy environments. The protection is based on new technology with a double casing that minimises resonance in the holder casing. This results in maximum high-frequency muffling, while at the same time it’s still easy to understand speech and signals. An acoustic connection between the inner volume and the volume between the casings in its turn provides maximum low-frequency muffling. Effective protection and best comfort are the hallmarks of Optime III.

  
  

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  Modern, stylish cup design

  Unique low profile stainless neckband design helps maintain constant pressure for constant pressure over long periods of use.

  Double casing technology helps minimise resonance effect.

  Good speech intelligibility.

  Large space inside cup helps reduce moisture and heat build-up increasing user comfort.

  Easy to replace cushions and inserts help keep them hygienically clean.

  Easy to understand attenuation symbol to help ensure correct product selection.

  Soft and wide sealing rings filled with a unique combination of foam and liquid, providing optimum sealing and low pressure.

  High attenuation despite lightness and low profile.

  A unique two-point attachment with individual spring action facilitates even pressure distribution.

    

  Frequency (Hz)	63	125	250	500	1000	2000	4000	8000
  Mf (dB)	20.9	17.5	24.5	34.5	41.4	39.5	47.3	42.0
  sf (dB)	3.3	2.3	2.7	2.0	2.2	2.0	4.4	2.8
  APVf (dB)	17.6	15.2	21.8	32.5	39.2	37.5	42.9	39.2

  SNR = 35dB            H = 40dB    M = 32dB   L = 23dB