Patent ID: 7433478
Filing Date: 2008-10-07
Classification: H04R

Abstract:
1. A microphone pick-up device comprising: an annular cap body having a front portion, a rear portion and an air passage unit; an air chamber unit disposed posteriorly of said cap body; a pick-up unit for generating an acoustic signal in response to detected sound, said pick-up unit including a signal filter disposed between said rear portion of said cap body and said air chamber unit and disposed posteriorly of said sound regulating paper, said signal filter being coupled to said voice coil and being adapted for filtering noise in the acoustic signal; and wherein said air chamber unit has a surrounding wall with front and rear ends, and an end wall disposed to close said rear end of said surrounding wall and cooperating with said surrounding wall so as to confine an air chamber, said front end of said surrounding wall being connected to said rear portion of said cap body, said surrounding wall being formed with a positioning member disposed in said front end for positioning said signal filter therein.