US 12,126,969 B1
Audio tone detection using analog processing
Steven Andryzcik, Pittsburgh, PA (US); Brandon David Rumberg, Pittsburgh, PA (US); Matthew Zeleznik, Pittsburgh, PA (US); and Michael Fuhrman, Pittsburgh, PA (US)
Assigned to ASPINITY, INC., Pittsburgh, PA (US)
Filed by ASPINITY, INC., Pittsburgh, PA (US)
Filed on Mar. 18, 2024, as Appl. No. 18/608,072.
Int. Cl. H04R 29/00 (2006.01)
CPC H04R 29/00 (2013.01) 18 Claims
OG exemplary drawing
 
1. A system, comprising:
a sound sensor; and
re-programmable and/or reconfigurable analog circuitry configured to monitor an acoustic signal sensed by the sound sensor and selectively generate a tone detection signal in response to an analysis of the acoustic signal and presence of at least one pre-determined tone frequency, and
a digital Microcontroller Unit (“MCU”), coupled to the analog circuitry, that receives the tone detection signal as a digital tone detection signal interrupt that causes the MCU to awake from a low power state and create a digital timestamp at each rising and falling edge of the tone detection signal.