this document provides a hearing assistance device for playing processed sound inside a wearer &# 39 ; s ear canal , the hearing assistance device comprising a first housing , signal processing electronics disposed at least partially within the first housing , a first microphone connected to the first housing , the first microphone adapted for reception of sound , a second microphone configured to receive sound from inside the wearer &# 39 ; s ear canal when the hearing assistance device is worn and in use and microphone mixing electronics in communication with the signal processing electronics and in communication with the first microphone and the second microphone , the microphone mixing electronics adapted to combine low frequency information from the first microphone and high frequency information from the second microphone to produce a composite audio signal .