Patent ID: 6067362
Filing Date: 2000-05-23
Classification: H04B,H04R

Abstract:
An audio system for use with an electromechanical apparatus,said electromechanical apparatus including a device coupled to said audio system,said device having a mechanical resonance excited by exciting spectral components of sound radiated by said audio system, comprising:an input for receiving audio signals,a gain reducer comprising,a threshold detector detecting presence of said exciting spectral components in said audio signals to provide a gain control signal, only when a predetermined threshold amplitude is exceeded,a gain cell reducing gain of said audio signals responsive to said threshold detector coupled to said input and said threshold detector and responsive to said gain control signal constructed and arranged to reduce exciting spectral components of sound radiated by said audio system,wherein said threshold detector is responsive to the amplitude of said exciting spectral components to provide a gain control signal that causes spectral components transmitted by said gain cell to reduce said gain to maintain said amplitude less than said predetermined threshold amplitude.