Electroacoustic & Audio

The purpose of the ElectroAcoustic and Audio Research Operation (OR-E2A) is the modeling, development and experimental characterization of electroacoustic sources and sensors, whose principles are based on different transduction processes (electrodynamic, electrostatic, piezoelectric, ionic, etc.). The targeted applications concern various fields such as audio, telephony, metrology, etc.
Thus, the topics addressed concern both sources and sensors. Their behavior can be approached as closely as possible: for example by studying the physical principles governing the transducer alone. The insertion of the transducer in more complex systems is also studied (modification of its radiation by acoustic charges). Finally, the networking of loudspeakers or microphones and their control is of particular interest to the OR-E2A.

In the last few years, the following topics have concentrated the activities of the OR-E2A researchers :

• The development of a loudspeaker where the digital-to-analog conversion is performed during the acoustic radiation;
• The characterization of transducer nonlinearities and the understanding of the underlying physical phenomena;
• The methods of fine characterization of loudspeaker systems;
• The development of microphone antennas and adapted signal processing;
• Field synthesis (loudspeaker array control) especially for custom listening area applications.