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Transducer Effects on Direct Digital-to-Acoustic Loudspeaker Arrays

In order to avoid the requirement of D-to-A converters when connecting a digital signal to a loudspeaker, researchers have examined numerous types of direct digital-to-sound transducers. This investigation considers an array of transducers fed directly by amplified streams that were obtained from a thermometer unary encoding scheme with a fixed or randomized bit-to-transducer assignment. Even though this research was limited by simulation assumptions and artificially devised transducer dimension, it considers the importance of using real sources rather than idealized point sources. The transducer types, sampling rate, and bit-to-transducer assignment influence the resulting acoustic field. Randomized bit assignment produced a significant reduction in distortion.

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JAES Volume 62 Issue 6 pp. 414-425; June 2014
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