PURPOSE: To convert an analog output signal from a microphone into an optional characteristic by simple operation without converting the analog state.

CONSTITUTION: In this microphone, n sound receiving elements m1 to mn are serially arranged and an interval between respective elements is set up to 'd'. When a sound speed is set up as 'c', a sound wave generated from the front is propagated with a time delay of d/c between respective elements. The characteristics of the sound wave can be changed without converting the sound wave into a digital signal by multiplying the outputs of respective elements m1 to mn by respective constants a1 to an and adding respective multiplied values.