Filters

An otoplastic may not attenuate 100%, because you still need to hear some sounds during your work. Therefore, a sound channel is created in the otoplasty. The channel has a filter to attenuate the sound. The attenuation of our filters varies by pitch. This allows us to filter out noise and let in useful sounds, such as voices, sirens or horns.

Ronell offers various filters. Based on your work environment, you can choose a suitable filter. The ideal attenuation reduces the average volume per day to +/- 80 decibels. Ask our hearing advisor for advice. 

Our filters

• Industry Grey*: suitable for work with noise levels up to 101 decibels per day on average. Such as grinding, jigsaws or motorcycling at 100 km/h 
• Industry Red*: suitable for work with noise levels up to 105 decibels per day on average. Such as lawn mowing, chainsaws or near a helicopter 
• Industry Purple*: suitable for work with noise levels up to 107 decibels per day on average. Such as a pressure washer, mower or angle grinder 
• Ambient Black: suitable for creating tranquillity. Such as travelling, sleeping or working in an office garden.  
• Shooting Beige: suitable for shooting sports. Attenuates 15 decibels as standard, but 33 decibels during the shot due to air pressure. 
• Music White: suitable for concerts and events. Attenuates by 20 decibels.  

 
Detailed attenuation of otoplastics: otoplastics: 

* Gray, Red and Purple are officially according to “EN 352-2: 2002” and (EU) 2016/425. certified. Therefore, these filters can be used as PPE in the workplace.