Patent ID: 7474755

Claim:
A method for automatically equalizing microphone signals in a directional microphone system having at least three omnidirectional microphones, wherein said at least three omnidirectional microphones are electrically connected in respective pairs to form a first directional microphone of the first order and a second directional microphone of the first order, said method comprising the steps of: matching only respective amplitudes of respective microphone signals generated by said omnidirectional microphones to make the respective amplitudes of the respective microphones signals generated by said omnidirectional microphones substantially equal to each other; and matching only respective amplitudes of respective microphone signals generated by said first and second directional microphones of the first order by phase shifting the microphone signal generated by at least one of the omnidirectional microphones to make the respective amplitudes of the respective microphones signals generated by said first and second directional microphones substantially equal to each other.