Radiation of a Piston: Electroacoustics

This lecture covers the coupling between electromechanical and mechanoacoustic systems, focusing on the radiation properties of a loudspeaker membrane and the influence of acoustic loads. It explains the impedance, directivity, and reaction of a loudspeaker, emphasizing the acoustic radiation and the mass of radiation. The lecture also discusses the behavior of the fluid in different enclosure types, such as closed and vented enclosures. It delves into the acoustic loads exerted by the fluid on the membrane, the continuity of the oscillating piston, and the radiation resistance. The presentation includes illustrations of different scenarios, such as the radiation field in free space and the phase shift between pressure and speed.