Loudspeaker Impedance Emulator for Multi Resonant Systems

Iversen NE, Knott A. Loudspeaker Impedance Emulator for Multi Resonant Systems. In: AES Convention 138. Audio Engineering Society; 2015. Paper 9289. Available from: https://aes.org/publications/elibrary-page/?id=17713

@inproceedings{Iversen2015_17713,
  author = {Iversen, Niels Elkjær and Knott, Arnold},
  title = {{Loudspeaker Impedance Emulator for Multi Resonant Systems}},
  booktitle = {AES Convention 138},
  note = {Paper 9289},
  year = {2015},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17713}
}

TY  - CPAPER
TI  - Loudspeaker Impedance Emulator for Multi Resonant Systems
AU  - Iversen, Niels Elkjær
AU  - Knott, Arnold
T2  - AES Convention 138
M1  - Paper 9289
PY  - 2015
DA  - 2015/05/06
UR  - https://aes.org/publications/elibrary-page/?id=17713
PB  - Audio Engineering Society
LA  - en
AB  - Specifying the performance of audio amplifiers is typically done by playing sine waves into a pure ohmic load. However real loudspeaker impedances are not purely ohmic but characterized by its electrical, mechanical, and acoustical properties. Therefore a loudspeaker emulator capable of adjusting its impedance to that of a given loudspeaker is desired for measurement purposes. An adjustable RLC-based emulator is implemented with switch controlled capacitors, air gap controlled inductors, and potentiometers. Calculations and experimental results are compared and show that it is possible to emulate the loudspeaker impedance infinite baffle-, closed box-, and the multi resonant vented box-loudspeaker by tuning the component values in the proposed circuit. Future work is outlined and encouraged that the proposed impedance emulator is used as part of a control circuit in a switch-mode based impedance emulator.
ER  -