Fabric filter medium PermaFlow

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Schlegel‘s unique porous film provides air/sound permeability and water/dustproof function at the same time, which prevents inundation and contamination inside of the case. Perfect for a number of applications, and can be die cut and molded into various sizes and shapes as materials for their sound, internal and external pressure control filters mobile phones, smart phones, digital cameras and other devices. Product Lines Sound Permeable Filter for Mobile Devices - Acoustic performance oriented product for microphones in mobile devices. - Acoustic loss in frequency ranges of human voice (low frequency) is within 2dB.