Method and device for voice interception, and laser-bounce voice source locating method

• Main Authors: LIN CHUTAO, CAO HUI, ZHANG BANGFENG, ZHONG TUJI, LIU WENZHAO, LIANG PEIYING, CHEN PEIHONG, LIU LIANXIANG
• Format: Patent
• Language: Chinese; English
• Published: 10.09.2014
• Subjects: ACOUSTICS; ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MUSICAL INSTRUMENTS; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION; TESTING

The invention relates to a method and a device for voice interception, and a laser-bounce voice source locating method. The method for voice interception comprises the steps of obtaining an interference mixed signal of reference light and measuring light on a photoelectric sensor, processing the interference mixed signal to obtain a middle signal comprising a direct-current component directly proportional to total light intensity and a sinusoidal component, subtracting a reference signal from the middle signal for restoring into a voice signal, wherein the amplitude of the sinusoidal signal is directly proportional to the intensity of the reference light and that of the measuring light. The method is used for non-contact detection of vibration conditions in different positions caused by a voice source by use of laser-bounce, and therefore, the position of the voice source and the playing contents of the voice source can be determined.