SOUND GENERATING SYSTEM FOR A SOUND MASKING PACKAGE

摘要

A self-contained sound masking package including an electric circuit for producing a signal having a predetermined frequency range within the audible spectrum and with the frequencies at predetermined relative decibel levels. The signal is applied to a transducer having a coil for introducing an audible sound of the predetermined frequency range and decibel levels into the area surrounding the housing. The electric circuit is preferably in the form of a printed circuit board and has filter means which may be selectively activated to provide an audible output from the transducers throughout at least two separate frequency ranges and decibel levels.