A MEASUREMENT METHOD FOR THE LINEAR AND NONLINEAR PROPERTIES OF ELECTROACOUSTIC TRANSMISSION-SYSTEMS

Competitive audio consumer products require not only cheap signal proc essing hardware but also low-cost analog equipment and sound transduce rs. The nonlinear distortions produced by these electro-acoustic trans mission systems cannot be described and analyzed by standard methods b ased on linear systems theory alone. In order to take the nonlinear pr operties into account, we present a measurement method for the linear and nonlinear transmission characteristics of almost arbitrary systems and show its application to the analysis of electro-acoustic systems. Examples demonstrate the measurement of the impulse response of a lou dspeaker-enclosure-microphone-system with cheap analog equipment in th e presence of background noise. (C) 1998 Elsevier Science B.V. All rig hts reserved.