Patent ID: 11899885
Assignee: INTEL CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 21:
22. A non-transitory computer readable medium comprising instructions to cause a computing device to at least:
produce a series of pulses;
access noise information output by a microphone, the noise information representative of the pulses and echoes of the pulses reflected off surfaces in a vicinity of the computing device;
generate a full echo profile based on the pulses and corresponding echoes;
identify peaks in the full echo profile, different ones of the peaks corresponding to either the pulses or the corresponding echoes;
identify repeating reference signals based on the peaks identified in the full echo profile, the repeating reference signals corresponding to the pulses;
identify an echo signal between separate occurrences of the repeating reference signals, the echo signal corresponding to one of the echoes; and
determine whether an object is within an activation region associated with the computing device based on a time difference between the echo signal and a preceding one of the repeating reference signals.