Patent ID: 11922949
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A device comprising:
a speaker;
a central processing unit configured to:
operate in a first power mode or a second power mode, wherein, in the second power mode, the central processing unit consumes less power than the first power mode, and
send output data to the speaker only while operating in the first power mode;

a microphone; and
a sound detector comprising a processor and a memory storing instructions that, upon execution by the processor, configure the sound detector to:
receive first input data corresponding to first audio detected by the microphone in the first power mode;
determine first root mean square (RMS) metrics from the first input data;
determine that the first RMS metrics indicate that the first input data represents ambient noise;
send first event data to the central processing unit, the first event data causing the central processing unit to operate in the second power mode;
receive second input data corresponding to second audio detected by the microphone in the second power mode;
determine second RMS metrics from the second input data;
determine that the second RMS metrics indicate that the second input data represents sound being detected by the microphone;
send second event data to the central processing unit, the second event data causing the central processing unit to operate in the first power mode;
receive status data of the central processing unit indicating that the central processing unit is performing a playback operation; and
cease, based at least in part on the status data, analysis of whether third input data received after the second input data represents a second sound event.