System and method for beamforming audio signals received from a microphone array

A beamforming system comprising:

• a microphone array;
• a vibration microphone;
• and
• an electronic processor communicatively coupled to the microphone array and the vibration microphone, and configured to
• receive at least one audio signal from the microphone array;
• determine a plurality of beams based on the at least one audio signal;
• receive from the vibration microphone at least one vibration signal;
• time align the at least one audio signal and the at least one vibration signal;
• determine a plurality of correlation values, each of the plurality of correlation values based on one of the plurality of beams and the at least one vibration signal;
• determine a peak correlation value based on the plurality of correlation values;
• and
• select one of the plurality of beams based on the peak correlation value.

A remote speaker microphone comprising:

• a microphone array;
• a vibration microphone;
• and
• an electronic processor communicatively coupled to the microphone array and the vibration microphone, and configured to
• receive at least one audio signal from the microphone array;
• determine a plurality of beams based on the at least one audio signal;
• receive from the vibration microphone at least one vibration signal;
• filter the at least one vibration signal to generate at least one filtered vibration signal;
• filter the plurality of beams to generate a plurality of filtered beams;
• determine a plurality of correlation values, each of the plurality of correlation values based on one of the plurality of filtered beams and the at least one filtered vibration signal;
• determine a peak correlation value based on the plurality of correlation values;
• and
• select one of the plurality of beams based on the peak correlation value.

A beamforming system comprising:

• a microphone array;
• a vibration microphone;
• and
• an electronic processor communicatively coupled to the microphone array and the vibration microphone, and configured to
• receive at least one audio signal from the microphone array;
• receive from the vibration microphone at least one vibration signal;
• time align the at least one audio signal and the at least one vibration signal;
• determine at least one correlation value based on the at least one audio signal and the at least one filtered vibration signal;
• determine a plurality of adaptive beamforming algorithm weights based on the at least one correlation value;
• and
• generate a beam based on the plurality of adaptive beamforming algorithm weights.