Patent ID: 7106876
Filing Date: 2006-09-12
Classification: H04R

Abstract:
1. A dual cartridge microphone for use in a vehicle comprising: (a) a printed circuit board; (b) a directional microphone cartridge contained on the printed circuit board, the directional microphone cartridge generating a first electrical signal, (c) a first preamplifier contained on the printed circuit board, the first preamplifier receiving the first electrical signal and generating a speech signal; (d) an omni-directional microphone cartridge contained on the printed circuit board, the omni-directional microphone generating a second electrical signal; (e) a second preamplifier contained on the printed circuit board, the second preamp ifier receiving the second electrical signal and generating a noise signal; (f) a housing mounted within the vehicle, the housing enclosing the printed circuit board the directional microphone cartridge and the omni-directional microphone cartridge; and (g) wherein the speech signal is used in a speech pickup application and the noise signal is used for loudspeaker volume compensation.