Patent ID: 9294829
Filing Date: 2016-03-22
CPC Classification: H04R

Claim Text:
1. A noise reduction filter for a microphone reducing unwanted wind noise, comprising: a first filter element made of a first material configured to filter out wind noise, wherein the first filter element comprises a first surface configured to face towards a first microphone inlet of a first sound tube, the first microphone inlet having a central axis; and a second filter element made of a second material configured to be impermeable to wind; wherein the second filter element is configured to be positioned at the central axis so that a first part of a sound wave travelling towards the first microphone inlet is prevented by the second filter element from passing through a second surface of the first filter element into the first filter element, wherein the second surface is configured to be positioned at the central axis; wherein the first filter element further comprises a sound receiving surface allowing a second part of the sound wave to propagate into the first filter element without interacting with the second filter element; and wherein the noise reduction filter further comprises: