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Performance Analysis of Digital Loudspeaker Arrays
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.
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