초록 ▼

A method and apparatus for reducing acoustic noise waves in the vicinity of an electrically conductive plasma, such as in the exhaust of a gas turbine engine, having a sensor to detect the noise wave and generate a representative electrical noise signal; a signal analyzer to analyze the noise signal

A method and apparatus for reducing acoustic noise waves in the vicinity of an electrically conductive plasma, such as in the exhaust of a gas turbine engine, having a sensor to detect the noise wave and generate a representative electrical noise signal; a signal analyzer to analyze the noise signal, a wave form generator to generate a phase inverted, electrical interference signal based on the noise signal, an amplifier, a time delay, an error corrector; and an applying means to conduct the electrical interference signal to the plasma causing the plasma to generate a pulsating interference wave to cancel the acoustic noise wave.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for canceling acoustic noise waves in a plasma which is vicinity of plasma which is an electrically conductive, expandable medium, said apparatus comprising:circuitry for generating an electrical noise signal representing said acoustic noise waves;a controlle

[ What is claimed is:] [1.] An apparatus for canceling acoustic noise waves in a plasma which is vicinity of plasma which is an electrically conductive, expandable medium, said apparatus comprising:circuitry for generating an electrical noise signal representing said acoustic noise waves;a controller electrically coupled to said circuitry for generating said electrical noise signal representing said acoustic waves for generating an electrical interference signal based on said electrical noise signal, said electrical interference signal being substantially phase inverted from said electrical noise signal to enable wave cancellation;a plasma coupling means electrically coupled to said controller for applying said electrical interference signal to said electrically conductive plasma; anda sound generating means associated with said electrical interference signal for enabling said electrically conductive plasma to generate a pulsating interference wave, thereby substantially canceling said acoustic noise waves.