Patent ID: 8798992

Claim:
A system comprising: a first grouping of one or more microphones operatively configured to transform acoustical background noise into electrical noise signals appearing at an output of each of said first grouping of microphones; a second grouping of one or more microphones operatively configured to transform acoustical voice signals into electrical voice signals appearing at an output of each of said second grouping of microphones; a detector-analyzer, electrically coupled to each of said outputs of said first grouping of microphones, that measures said electrical noise signals and provides an indicator signal describing at least one parameter of said electrical noise signals; a controller, electrically coupled to said detector-analyzer, said controller comprising a comparator that compares said indicator signal with a plurality of predetermined threshold levels that define N adjacent, non-overlapping ranges, said comparator generates control signals indicative of a relationship between said indicator signal and said plurality of predetermined threshold levels and processes said electrical noise signal as determined by said control signals; a database storing a plurality of prerecorded noise signals, operatively connected to said controller, and operatively configured to select and playback one of said plurality of prerecorded noise signals in response to said control signal; and a combiner connected to said second grouping of one or more microphones and said controller, said combiner sums said processed electrical noise signal, and said electrical voice signals, and outputs a sum.