Patent ID: 7020290

Claim:
An apparatus for picking up sound wherein at least three essentially omnidirectional microphones and at least three discrimination units are provided, wherein a first microphone is connected to an input port of the second and the third discrimination unit, the second microphone is connected to an input port of the first and the third discrimination unit, and the third microphone is connected to an input port of the first and the second discrimination unit, each discrimination unit comprising a first and a second subtractor, each of which has an input port connected with a first and at least another microphone respectively, a first and a second delaying unit having input ports connected with output ports of the first and the second subtractor respectively, for delaying the output signals a predetermined time, wherein an output port of the first delaying unit is connected to a negative input port of the second subtractor and wherein an output port of the second delaying unit is connected to a negative input port of the first subtractor.