The invention discloses an ultrasonic-assisted
microphone array
speech enhancement device, and relates to voice
signal treatment. The ultrasonic-assisted
microphone array
speech enhancement device comprises an
equidistant linear array, a preamplification circuit, an analog-
digital conversion circuit, two ultrasonic sensors, a transmitting circuit, a receiving circuit, a position computation module and a weighted stacking module, wherein, the
equidistant linear array comprises five microphones; an output end of the
linear array is sequentially connected with the preamplification circuit, the analog-
digital conversion circuit, data cables and the weighted stacking module; the sensors are installed on extended lines at two ends of the linear array; the transmitting circuit and the receiving circuit utilize the sensors to transmit signals, and the received signals are processed through preamplification and analog-
digital conversion and then are sent to the position computation module; in addition, the position computation module acquires return wave receiving signals of the sensors for matched filtering so as to acquire the ultrasonic
transit time from a target to the sensors, acquires sound source position information that is input to the weighted stacking module, calculates time-
delay compensation values of channels, performs time-
delay compensation and stacking on each channel receiving
signal of a
microphone array so as to enhance voice signals in sound source directions.