Wrist wearable apparatuses and methods with desired signal extraction

An apparatus to be worn on a user's wrist, comprising:

• a wrist wearable device, the wrist wearable device is configured to be worn on the user's wrist;
• a first microphone, the first microphone has a first response pattern and the first response pattern has a first major response axis, the first microphone is coupled to the wrist wearable device, the first microphone is positioned on the wrist wearable device to receive a voice signal from the user;
• a second microphone, the second microphone is coupled to the wrist wearable device, the second microphone and the first microphone are separated by a distance on the wrist wearable device such that a distance between the first microphone and the user's mouth is less than a distance between the second microphone and the user's mouth when the wrist wearable device is in a receive orientation;
• a beamformer, the beamformer is configured to receive input signals from at least the first microphone and the second microphone and to provide a main signal on a main channel and at least one reference signal on at least one reference channel;
• an adaptive noise cancellation unit, the adaptive noise cancellation unit receives the main signal and the at least one reference signal from the beamformer, the adaptive noise cancellation unit reduces a first amount of undesired audio from the main signal to form a filtered output signal;
• a filter control, the filter control is coupled to the beamformer, the filter control creates a control signal from the main signal and the at least one reference signal to control reduction of undesired audio;
• and
• a single channel noise reduction unit, the single channel noise reduction unit receives the filtered output signal and is coupled to the filter control, the single channel noise reduction unit reduces a second amount of undesired audio from the filtered output signal to provide mostly desired audio in the main signal.

An apparatus to be worn on a user's wrist, comprising:

• a wrist wearable device;
• a data processing system, the data processing system is configured to process acoustic signals and the data processing system is contained within the wrist wearable device;
• and
• a computer readable medium containing executable computer program instructions, which when executed by the data processing system, cause the data processing system to perform a method comprising:
• receiving a main signal and a reference signal;
• producing a filter control signal from the main signal and the reference signal, the main signal is normalized by the reference signal to provide a normalized main signal to the producing;
• applying a first stage of filtering with the main signal and the reference signal input to a multi-channel filter to reduce a first amount of undesired audio from the main signal, wherein the filter control signal is used to separate desired audio from undesired audio during the applying;
• and
• applying a second stage of filtering to an output of the first stage to create a second reduction in undesired audio from the main signal, the filter control signal is used to separate desired audio from undesired audio in the second stage, the second stage outputs a main signal which is mostly desired audio.

An apparatus to be worn on a user's wrist, comprising:

• means for determining an orientation of a wrist wearable device;
• means for selecting a main microphone channel and a reference microphone channel based on the orientation;
• and
• means for reducing undesired audio in the main microphone channel.