Abstract
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 characterised 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 encourage that the proposed impedance emulator is used as part of a control
circuit in a switch-mode based impedance emulator.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 138th AES Convention |
| Number of pages | 10 |
| Publisher | Audio Engineering Society |
| Publication date | 2015 |
| Article number | 9289 |
| Publication status | Published - 2015 |
| Event | 138th Audio Engineering Society Convention - Warsaw, Poland Duration: 7 May 2015 → 10 May 2015 Conference number: 138 |
Conference
| Conference | 138th Audio Engineering Society Convention |
|---|---|
| Number | 138 |
| Country/Territory | Poland |
| City | Warsaw |
| Period | 07/05/2015 → 10/05/2015 |