An analysis of digital loudspeaker arrays shows that the ways in which bits are mapped to the drivers influence the quality of the audio result. Specifically, a “bit-summed” rather than the traditional “bit-mapped” strategy greatly reduces the number of times drivers make binary transitions per period of the input frequency. Detailed simulations compare the results for a 32-loudspeaker array with a similar configuration with analog excitation of the drivers. Ideally, drivers in digital arrays should be very small and span a small area, but that sets limits on the low-frequency response.

Authors: Pedersen, Bo Rohde; Kontomichos, Fotios; Mourjopoulos, John
Affiliations: Department of Software and Electronics, Aalborg University, Esbjerg Denmark; Audio and Acoustic Technology Group, Wire Communications Laboratory, Electrical Engineering and Computer Engineering Department, University of Patras, Patras, 26500 Greece(See document for exact affiliation information.)
JAES Volume 56 Issue 9 pp. 667-683; September 2008
Publication Date: October 10, 2008

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