Stereo audio input apparatus

The stereo sound input device comprises a first microphone (microphone), a second microphone and a signal processor. Wherein the first microphone has a shape that can be inserted into the ear of a user, and converts the received sounds into a first electrical signal. It said second microphone has a shape that can be inserted into the ear of a user, and converts the received sounds into a second electrical signal. The signal processing section processes the first and second electrical signals output from the first microphone and the second microphone.