Abstract: Determination of a set of acoustic parameters for a headset is presented herein. The set of acoustic parameters can be determined based on a virtual model of physical locations stored at a mapping server. The virtual model describes a plurality of spaces and acoustic properties of those spaces, wherein the location in the virtual model corresponds to a physical location of the headset. A location in the virtual model for the headset is determined based on information describing at least a portion of the local area received from the headset. The set of acoustic parameters associated with the physical location of the headset is determined based in part on the determined location in the virtual model and any acoustic parameters associated with the determined location. The headset presents audio content using the set of acoustic parameters received from the mapping server.

Abstract: An audio system generates virtual acoustic environments with three-dimensional (3-D) sound from legacy video with two-dimensional (2-D) sound. The system relocates sound sources within the video from 2-D to into a 3-D geometry to create an immersive 3-D virtual scene of the video that can be viewed using a headset. Accordingly, an audio processing system obtains a video that includes flat mono or stereo audio being generated by one or more sources in the video. The system isolates the audio from each source by segmenting the individual audio sources. Reverberation is removed from the audio from each source to obtain each source's direct sound component. The direct sound component is then re-spatialized to the 3-D local area of the video to generate the 3-D audio based on acoustic characteristics obtained for the local area in the video.

Abstract: Determination of a set of acoustic parameters for a headset is presented herein. The set of acoustic parameters can be determined based on a virtual model of physical locations stored at a mapping server. The virtual model describes a plurality of spaces and acoustic properties of those spaces, wherein the location in the virtual model corresponds to a physical location of the headset. A location in the virtual model for the headset is determined based on information describing at least a portion of the local area received from the headset. The set of acoustic parameters associated with the physical location of the headset is determined based in part on the determined location in the virtual model and any acoustic parameters associated with the determined location. The headset presents audio content using the set of acoustic parameters received from the mapping server.

Abstract: An audio system on a headset presents, to a user, audio content simulating a target artificial reality environment. The system receives audio content from an environment and analyzes the audio content to determine a set of acoustic properties associated with the environment. The audio content may be user generated or ambient sound. After receiving a set of target acoustic properties for a target environment, the system determines a transfer function by comparing the set of acoustic properties and the target environment's acoustic properties. The system adjusts the audio content based on the transfer function and presents the adjusted audio content to the user. The presented adjusted audio content includes one or more of the target acoustic properties for the target environment.

Abstract: A virtual-reality device displays a virtual scene. The device generates audio data for an area source in the virtual scene. The area source is within a predefined near-field distance from the listener. The device selects sample points from the area source and determines, for each sample, energy contributions to two respective successive shells of spherical shells that extend from the listener to the predefined near-field distance. The two shells enclose the sample point source, and the determined energy contributions correspond to sound originating from the sample point source. For each shell, the device determines a head-related impulse response (HRIR) by combining the determined energy contributions for that shell. The device determines an overall HRIR for the virtual scene by combining the determined HRIRs for the shells and combines the audio data with the overall HRIR. The device transmits the combined audio data to sound-producing elements of the device.

Abstract: A virtual-reality device displays a virtual scene. The scene includes an area sound source, which is located within a predefined near-field distance from the listener (e.g., less than one meter). The device selects sample point sources from the area source and projects audio data from each sample onto a virtual sphere surrounding the listener. The virtual sphere comprises multiple concentric spherical shells that extend from the listener. The device determines, for each sample, energy contributions of the sample to two respective successive shells that enclose the sample. The device determines a head-related impulse response (HRIR) for each shell by combining energy contributions that are associated with the respective shell. The device determines an overall HRIR for the virtual scene by combining the determined HRIRs for the shells. The device convolves the audio data with the overall HRIR and transmits the convolved audio data to sound-producing devices of the virtual-reality device.

Abstract: A method clusters audio sources in virtual environments. The method is performed at a virtual-reality device displaying a virtual environment. The device identifies two audio sources in the virtual environment. For each of the two audio sources, the device determines a bounding box in the virtual environment. Each bounding box includes termination points for a respective plurality of rays emanating from a point in the virtual environment corresponding to the audio source. The device applies an overlap test to the bounding boxes to determine whether the two audio sources are in a same room. The device forms an angle according to rays from the location of the listener to the audio source points. When the two audio sources are in the same room and the angle is less than a predetermined threshold angle, the device clusters the two audio sources together, including rendering combined audio for the two audio sources.