Multiple microphone based low complexity pitch detector

A system, comprising:

• a plurality of microphones configured to provide a primary signal and a secondary signal;
• a level difference detector configured to determine a level difference between the primary and secondary signals;
• and
• a pitch identifier configured to clip the primary and secondary signals based at least in part upon the level difference.

A method, comprising:

• obtaining, by a computing device, a section of a primary signal and a corresponding section of a secondary signal, the primary and secondary signals associated with a plurality of microphones;
• determining, by the computing device, a pitch value based at least in part upon a level difference between the primary signal and secondary signal;
• determining, by the computing device, a pitch lag based upon the pitch value;
• determining, by the computing device, a pitch prediction gain variation for the primary signal section based at least in part upon the pitch lag;
• and
• determining, by the computing device, the presence of voice activity based upon the pitch prediction gain variation.