Precision noise filtration. Hear what you want, not what you don’t. It’s all very well trying to block out all sound – but sometimes you still need to be able to hear conversation, the cry of a baby, a car horn etc. Auritech’s patented precision-tuning means you can reduce the noises you don’t want to hear, but keep those that you do. And because our filters are formed with the Venturi-shaped sound channel, from high grade ceramic material (zirconium oxide) at 2,715°C, the internal aperture surface is perfectly smooth. This results in more precise sound attenuation than with plastic (PE) filters which leave a rough, uneven channel surface