Patent ID: 7369664

Claim:
An airflow guard for a microphone, the airflow guard comprising: a shell having a mating surface, an airflow diverter and a flow separation edge, said flow separation edge being positioned downstream of the airflow diverter, and said shell being adapted for installation in a vehicle such that said mating surface is positionable adjacent a vehicle surface with the microphone being located under said shell; and an acoustic entry port located in said shell between the flow separation edge and the mating surface and at least partially bordered by the flow separation edge to allow entry of acoustic sound into the microphone; wherein the airflow diverter partially surrounds the microphone to redirect a flow of air away from the microphone, and wherein the flow of air separates from the flow separation edge to generate a recirculating flow downstream of the acoustic entry port to thereby reduce the level of pressure fluctuations in front of the microphone.