Small Signal Loudspeaker Impedance Emulator

Niels Elkjær Iversen, Arnold Knott

Research output: Contribution to journalJournal articleResearchpeer-review

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 characterized by the mechanical resonance between the mass of the diaphragm and the compliance of its suspension which vary from driver to driver. Therefore, a loudspeaker emulator capable of adjusting its impedance to that of a given driver is desired for measurement purposes. This paper proposes a loudspeaker emulator circuit for small signals. Simulations and experimental results are compared and show that it is possible to emulate the loudspeaker impedance with an electric circuit and that its resonance frequency can be changed by tuning two resistors.
Original languageEnglish
JournalJournal of Audio Engineering Society
Volume62
Issue number10
Pages (from-to)676-682
ISSN1549-4950
Publication statusPublished - 2014

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