Patent ID: 11955136
Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A system, comprising:
a plurality of audio sensing devices, wherein each audio sensing device of the plurality of audio sensing devices includes an audio sensor in communication with a processor, wherein the processor is operable to:
generate audio data descriptive of a sound;
determine if the audio data is indicative of a sharp increase in an amplitude of the sound and a sharp decrease in a spectral centroid of the sound; and
transmit one or more values indicative of the audio data if the audio data is indicative of a sharp increase in an amplitude of the sound and a sharp decrease in a spectral centroid of the sound,
wherein the processor detects a gunshot by computation of a vector of change from the audio data, the vector of change including outputs of a direction and a magnitude that reflect a quick rise and fall time of the sound indicative as to a presence of the gunshot,

wherein each audio sensing device of the plurality of audio sensing devices is further operable to transform the audio data into a plurality of frequency domain frames, wherein each frequency domain frame of the plurality of frequency domain frames is associated with a unique time interval of the audio data, and
wherein each audio sensing device of the plurality of audio sensing devices is further operable to:
determine a first amplitude of a first frequency domain frame of the plurality of frequency domain frames;
determine a second amplitude of a second frequency domain frame of the plurality of frequency domain frames; and
generate an amplitude difference vector between the first amplitude and the second amplitude.