Miniature Microphone Using an Integrated Piezoresistive Pressure Transducer
An experimental pressure microphone has been constructed utilizing a chip from an integrated-circuit pressure transducer. The frequency response is uniform from 20 to 20 000 Hz. The microphone has been successfully used for real-ear testing of stereophones, where it is placed under the ear cap. The balanced low-impedance output of the transducer potentially affords good electromagnetic-interference (EMI) rejection. Pressure gradient configurations are realizable. At present low electroacoustic sensitivity limits potential audio applications of the transducer to high-level sound pickup, including close-talking microphone or musical instrument sound pickups. Further research could result in broader applications.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is temporarily free for AES members.