Starting with the smallest headphones for mobile devices via loudspeakers in your lounge up to the powerful sound system equipment for open air concerts in sports stadia, all materials involved here are part of electro acoustics. The reproduction of sound provides a wide area of applications of the above mentioned conversion technologies. In the age of the digital storage of information of any kind the actual storage procedure can hardly be considered part of electro acoustics, though modern processes of data reduction (MP3 and similar) which use psycho acoustic phenomena, can be considered part of acoustics and in particular of ELA. Historically seen the storage of sound on media like records or tapes are part of ELA, least of all because conversion processes are effected with more or less major faults like linear and nonlinear distortions, and a specific kind of signal processing (filters, distortion correction etc.) are required. The signal processing before or behind the converters is an essential precondition for a faultless conversion and is therefore also part of electro acoustics. In first place here come the conversion processes between the world of acoustics (mechanical) and the world of electrics as are part of electro acoustics, that is to say: microphones and loudspeakers. Under the heading electro acoustics come all technologies and processes which are required for the reception, reproduction, processing and storing of sound signals. Behler ITA ITA - omnidirectional measuring loudspeaker
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