Methods and Apparatus for Unsupervised Wakeup with Time-Correlated Acoustic Events

An article, comprising:

• a non-transitory computer readable medium having stored instructions that enable a machine to:
• receive a first acoustic event at a first time and a second acoustic event at a second time, wherein the first and second acoustic events have scores above a first threshold identifying the first and second acoustic events as wakeup candidates for a wakeup phrase for an unsupervised wakeup of a device;
• determine that the first acoustic event score is below a second threshold, which is higher than the first threshold;
• and
• determine whether a difference between the first and second times is within a range to check for correlation in time between the first and second acoustic events;
• and
• determine that a wakeup event has occurred based upon the first and second times.

A system, comprising:

• a processor and a memory configured to:
• receive a first acoustic event at a first time and a second acoustic event at a second time, wherein the first and second acoustic events have scores above a first threshold identifying the first and second acoustic events as wakeup candidates for a wakeup phrase for an unsupervised wakeup of a device;
• determine that the first acoustic event score is below a second threshold, which is higher than the first threshold;
• and
• determine whether a difference between the first and second times is within a range to check for correlation in time between the first and second acoustic events;
• and
• determine that a wakeup event has occurred based upon the first and second times.