Hazard Detection With Speech Processing

A hazard detector comprising:

• a microphone configured to record an audio signal;
• a hazard sensor;
• a detection circuit in communicative connection with the hazard sensor;
• and
• a processing unit in communicative connection with the detection circuit and with the microphone;
• wherein the detection circuit receives sensor signals from the hazard sensor and generates a detector signal as a function of the sensor signals, the detector signal representing a positive or negative indication with respect to a hazard;
• and
• the processing unit comprises a digital interface for communication with an external computer and is configured:
• to receive the detector signal from the detection circuit;
• to receive the audio signal from the microphone and to detect a predetermined preamble comprising a word in the audio signal;
• and
• if the detector signal contains a positive indication with respect to a hazard or if a predetermined preamble is detected in the audio signal, to generate a digital output signal as a function of the received audio signal and send the digital output signal to the external computer via the digital interface.