Measurement and Application of Equivalent Input Distortion
A new technique for measuring nonlinear distortion in transducers is presented which considers a priori information from transducer modeling. Transducers are single-input, multiple-output (SIMO) systems where the dominant nonlinearities can be concentrated in a single source, adding nonlinear distortion to the input signal. Assessing the distortion at the source results in more meaningful data describing the large-signal behavior of loudspeakers independent of the linear transfer response. Since the distortion source is not accessible for direct measurements, the equivalent input distortions are calculated from the sound pressure output. This technique makes it possible to predict the distortion in the sound field, to investigate the influence of the acoustical environment (room), and to separate noise and other disturbances not generated by the transducer.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.