Patent ID: 6888945

Claim:
A sound masking system, comprising: a masking signal generator operative to generate a plurality of incoherent masking sound signals, the masking sound signals having spectra tailored to achieve a desired masking sound spectrum when the masking sound signals are emitted by loudspeakers in a multi-occupant workspace; and a plurality of loudspeaker modules, the loudspeaker modules and masking signal generator being interconnected in a daisy-chain fashion such that the masking sound signals are received by each loudspeaker module on respective input connections and transmitted to an adjacent loudspeaker on respective output connections, each loudspeaker module including a loudspeaker connected to a predetermined one of the input connections, the interconnection between each pair of adjacent loudspeaker modules being operative to shift the input connections on which the respective masking sound signals appear such that successive loudspeakers emit different ones of the masking sound signals.