Abstract: A speech aid system includes a tube for mounting at a tracheostomy of a user, a voice parameter acquiring device mounted to the tube and generating a voice parameter signal according to airflow applied within the tube resulting from attempt by the user to speak, a processor generating an audio signal corresponding to the voice parameter signal, and a sound generator for mounting in an oral cavity of the user. The sound generator produces a substitute glottal sound corresponding to the audio signal.

Abstract: A speech recognition system is to be used on a human subject. The speech recognition system includes an image capturing device, an oral cavity detecting device and a speech recognition device. The image capturing device captures images of lips of the subject during a speech of the subject. The oral cavity detecting device detects contact with a tongue of the subject and distance from the tongue of the subject, and accordingly generates a contact signal and a distance signal. The speech recognition device processes the images of the lips and the contact and distance signals so as to obtain content of the speech of the subject.

Abstract: In a method of audio signal processing, a hearing aid system is configured to: collect sound information of a surrounding environment of the hearing aid system; capture an image of the surrounding environment of the hearing aid system; perform a directional signal processing operation on the sound information so as to generate an output audio signal; the output audio signal containing an extracted voice signal that comes from an area corresponding to a location of a target object in the image; and output the output audio signal.

Abstract: A speech aid system includes a tube for mounting at a tracheostomy of a user, a voice parameter acquiring device mounted to the tube and generating a voice parameter signal according to airflow applied within the tube resulting from attempt by the user to speak, a processor generating an audio signal corresponding to the voice parameter signal, and a sound generator for mounting in an oral cavity of the user. The sound generator produces a substitute glottal sound corresponding to the audio signal.

Abstract: An overload power cut-off device is provided in an electric auxiliary system for avoiding overload in the system. The device includes a current detecting unit, a voltage comparing unit, an alarm unit, and a power cut-off unit. The current detecting unit includes a sensor coupled to the loop of the system for detecting a loop current of the system so as to output a sensing signal corresponding to the loop current. The voltage comparing unit compares the voltage value of the sensing signal with a preset voltage value and a voltage value of a rated current for respectively outputting a first driving signal and a second driving signal. The alarm unit receives the first driving signal to generate an alarm signal. The power cut-off unit receives the second driving signal to output a power cut-off signal for cutting off the power supply loop of the electric auxiliary system.