Interactions in a multiple voice coil loudspeaker

Y. Huang, Simon Busbridge, Peter A. Fryer

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNpeer-review


A seven-bit digital multiple voice coil loudspeaker and constant current driver has been constructed and evaluated. Two's compliment coding offers the best compromise between complexity, excessive power consumption and distortion due to base-line drift. The effect of motion impedance and mutual coupling in a multiple coil system is found to magnify the effective impedance of an individual coil by its weighting in the binary representation. This effect places an unreasonable demand on the output impedance of the driver unless damping is controlled, which can most effectively be achieved by a shorted voice coil. Optimum damping occurs when the damping resistance is equal to minus the resistance of an individual coil
Original languageEnglish
Title of host publication106th AES Convention
Place of PublicationMunich
Number of pages1
Publication statusPublished - 1 May 1999
Event106th AES Convention - MOC Center, Munich, Germany, May 1999
Duration: 1 May 1999 → …


Conference106th AES Convention
Period1/05/99 → …


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