Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to generate spatial audio based on computer vision. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to determine a position of an audio source based on an image generated via a camera, and apply an audio spatialization filter to an audio signal generated by a microphone based on the position of the audio source.

Abstract: Apparatus, systems, and methods for microphone gain control for electronic user devices are disclosed. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to determine a proximity of a user to a user device based on an image generated via one or more cameras associated with the user device, determine an amount of gain to be applied to an audio signal generated by a microphone associated with the user device based on the proximity of the user, and cause an amplifier of the user device to apply the gain to the audio signal.

Abstract: Methods, apparatus, systems, and articles of manufacture for camera image stream selection for electronic user devices are disclosed. An example apparatus disclosed herein includes head pose estimation circuitry to determine, based on first image data and second image data, (a) a first orientation of a user relative to a first camera and (b) a second orientation of the user relative to a second camera, the first image data associated with a first video stream output by the first camera and the second video data associated with a second video stream output by the second camera, and video stream selection circuitry to select one of the first video stream or the second video stream based on the first orientation and the second orientation.

Abstract: Methods and apparatus to detect proximity of objects to computing devices using near ultrasonic sound waves are disclosed. An example apparatus includes a frequency analyzer to determine power levels of noise in different frequency bands associated with sound waves sensed by a microphone of a computing device. The example apparatus further includes a signal generator to cause a speaker to produce a series of acoustic pulses. A central frequency of the pulses is defined based on the power levels of noise in the different frequency bands. The sound waves are sensed by the microphone to include the pulses and echoes of the pulses reflected off objects in a vicinity of the computing device. The example apparatus also includes an object detection analyzer to determine whether a first object is within an activation region associated with the computing device based on the pulses and the echoes sensed by the microphone.

Abstract: Methods and apparatus to detect proximity of objects to computing devices using near ultrasonic sound waves are disclosed. An example apparatus includes a signal generator to cause a speaker of a computing device to produce a series of pulses. Successive ones of the pulses are spaced at fixed intervals. Ones of the pulses having a central frequency between 18 kHz and 24 kHz. The example apparatus includes an echo profile generator to process noise information sensed by a microphone of the computing device. The noise information includes the pulses and echoes of the pulses reflected off objects in a vicinity of the computing device. The example apparatus further includes an object detection analyzer to determine whether a first object is within an activation region associated with the computing device based on the pulses and the echoes sensed by the microphone.

Abstract: Methods, apparatus, systems, and articles of manufacture for camera image stream selection for electronic user devices are disclosed. An example apparatus disclosed herein includes head pose estimation circuitry to determine, based on first image data and second image data, (a) a first orientation of a user relative to a first camera and (b) a second orientation of the user relative to a second camera, the first image data associated with a first video stream output by the first camera and the second video data associated with a second video stream output by the second camera, and video stream selection circuitry to select one of the first video stream or the second video stream based on the first orientation and the second orientation.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to generate spatial audio based on computer vision. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to determine a position of an audio source based on an image generated via a camera, and apply an audio spatialization filter to an audio signal generated by a microphone based on the position of the audio source.

Abstract: Apparatus, systems, and methods for microphone gain control for electronic user devices are disclosed. An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to determine a proximity of a user to a user device based on an image generated via one or more cameras associated with the user device, determine an amount of gain to be applied to an audio signal generated by a microphone associated with the user device based on the proximity of the user, and cause an amplifier of the user device to apply the gain to the audio signal.

Abstract: Methods and apparatus to detect proximity of objects to computing devices using near ultrasonic sound waves are disclosed. An example apparatus includes a frequency analyzer to determine power levels of noise in different frequency bands associated with sound waves sensed by a microphone of a computing device. The example apparatus further includes a signal generator to cause a speaker to produce a series of acoustic pulses. A central frequency of the pulses is defined based on the power levels of noise in the different frequency bands. The sound waves are sensed by the microphone to include the pulses and echoes of the pulses reflected off objects in a vicinity of the computing device. The example apparatus also includes an object detection analyzer to determine whether a first object is within an activation region associated with the computing device based on the pulses and the echoes sensed by the microphone.

Abstract: Methods and apparatus to detect proximity of objects to computing devices using near ultrasonic sound waves are disclosed. An example apparatus includes a signal generator to cause a speaker of a computing device to produce a series of pulses. Successive ones of the pulses are spaced at fixed intervals. Ones of the pulses having a central frequency between 18 kHz and 24 kHz. The example apparatus includes an echo profile generator to process noise information sensed by a microphone of the computing device. The noise information includes the pulses and echoes of the pulses reflected off objects in a vicinity of the computing device. The example apparatus further includes an object detection analyzer to determine whether a first object is within an activation region associated with the computing device based on the pulses and the echoes sensed by the microphone.

Abstract: Mobile device and method of operating such device with which a near ultrasonic acoustic signal may be produced for emission by an existing transducer, such as an ear piece, to cause a corresponding echo from a proximate object. The echo may be received by another existing transducer, such as a microphone, and processed to produce a corresponding status signal indicative of the proximity of such object.

Abstract: Methods and apparatus to detect proximity of objects to computing devices using near ultrasonic sound waves are disclosed. An example apparatus includes a signal generator to cause a speaker of a computing device to produce a series of pulses. Successive ones of the pulses are spaced at fixed intervals. Ones of the pulses having a central frequency between 18 kHz and 24 kHz. The example apparatus includes an echo profile generator to process noise information sensed by a microphone of the computing device. The noise information includes the pulses and echoes of the pulses reflected off objects in a vicinity of the computing device. The example apparatus further includes an object detection analyzer to determine whether a first object is within an activation region associated with the computing device based on the pulses and the echoes sensed by the microphone.

Abstract: Mobile device and method of operating such device with which a near ultrasonic acoustic signal may be produced for emission by an existing transducer, such as an ear piece, to cause a corresponding echo from a proximate object. The echo may be received by another existing transducer, such as a microphone, and processed to produce a corresponding status signal indicative of the proximity of such object.

Abstract: Methods and apparatus to detect proximity of objects to computing devices using near ultrasonic sound waves are disclosed. An example apparatus includes a signal generator to cause a speaker of a computing device to produce a series of pulses. Successive ones of the pulses are spaced at fixed intervals. Ones of the pulses having a central frequency between 18 kHz and 24 kHz. The example apparatus includes an echo profile generator to process noise information sensed by a microphone of the computing device. The noise information includes the pulses and echoes of the pulses reflected off objects in a vicinity of the computing device. The example apparatus further includes an object detection analyzer to determine whether a first object is within an activation region associated with the computing device based on the pulses and the echoes sensed by the microphone.