Sound system with enhanced low frequency distribution

Claim 1

Apparatus for issuing a sweeping sonic beam comprising: A. a low frequency oscillator for issuing a signal representing a continually changing angle; B. a function generator including means for generating first and second function signals representing first and second functions of said continually changing angle; C. first and second electronic multipliers, each of said electronic multipliers having a plurality of inputs for accepting a corresponding plurality of input signals to be multiplied, each of said electronic multipliers having an output for issuing a product signal representing the product of the input signals; D. means for applying said first function signal to a first one of said plurality of inputs to said first electronic multiplier and means for applying said second function signal to a first one of said plurality of inputs to said second electronic multiplier; E. a source of first and second information signals representing sound; F. means for applying said first information signal to a second one of said plurality of inputs to said first electronic multiplier and means for applying said second information signal to a second one of said plurality of inputs to said second electronic multiplier; G. first and second speaker systems mutually disposed at an angle approximating the angular distance described between said first and second functions; and H. first and second amplifiers for driving said first and second speaker systems respectively in response to the respective product signals from said first and second multipliers.