AES British Section lectures - June 2007
Nonlinear Control of Loudspeaker Systems
Wolfgang Klippel, Klippel GmbH
www.klippel.de
Nonlinearities inherent in electromechanical and electroacoustical transducers produce signal distortion and limit the maximum amplitude of the output signal. Assessing the large-signal performance has been a subject of acoustical research for many years providing nonlinear models and new methods for the measurement of large-signal parameters. The identified model allows prediction and simulation of the nonlinear behaviour and direct comparison with measured symptoms. The good agreement between model and reality is the basis for developing novel digital controllers dedicated to transducers that compensate actively for nonlinear distortion by inverse preprocessing of the electrical input signal. This paper gives a lecture on the activities in the last 15 years and describes new challenges for the future.
The Klippel GmbH is an innovative German company founded by Dr.-Ing. habil. Wolfgang Klippel in 1997 to produce novel control and measurement systems for loudspeakers. The current developments are based on the results of loudspeaker research performed by Wolfgang Klippel over 15 years and published in numerous scientific papers and patents. He contributed to the development of large-signal models for loudspeakers which are the basis for digital compensation of the nonlinear distortion. His pioneering work was recognized by awards of the Audio Engineering Society.
Lecture recording - mp3 format (25.2 MB)
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