Patent ID: 6373955
Filing Date: 2002-04-16
Classification: H03K,H04R

Abstract:
A loudspeaker comprisinga plurality of substantially identical transducers each arranged to convert an electrical loudspeaker-input-signal into an acoustic output, wherein each transducer is driveable independently of all others by discrete-time-sampled digital signals representative of the sound to be produced by the loudspeaker, and wherein each of the transducers (4) is such as to produce pressure pulses when driven by an electrical signal, an encoder for converting a non-unary discrete-time-sampled digital input signal into a plurality of discrete-time-sampled unary digital signals, said encoder having an output coupled to said transducers; and wherein each transducer produces an approximately constant sound pulse for the duration of a unary digital drive signal pulse so that the cumulative effect of the transducers is to produce an output sound representative of the input signal.