Patent ID: 11857311
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC A  H | IPC A  H

Claim 5:
6. The multi-purpose video monitoring camera as in claim 3, further comprising a mic array operably coupled to the microprocessor; the breathing sound detection module is configured to:
(1) obtain input from the mic array;
(2) perform beamforming on the input obtained in (1) to focus on sound produced near the mouth and the nose of the baby;
(3) detect sound pressure level of output from (2);
(4) build a history of the sound pressure level detected in (3);
(5) calculate a third breathing rate of the baby by counting number of cycles per minute between sound pressure level higher than a predetermined threshold value and sound pressure level lower than a predetermined threshold value from the history of sound pressure level in (4).