Abstract: Techniques for improving microphone noise suppression are provided. As wind noise may disproportionately impact a subset of microphones, a method for processing audio data using two adaptive reference algorithm (ARA) paths in parallel is provided. For example, first ARA processing performs noise cancellation using all microphones, while second ARA processing performs noise cancellation using only a portion of the microphones. As the first ARA processing and the second ARA processing are performed in parallel, beam merging can be performed using beams from the first ARA, the second ARA, and/or a combination of each. In addition, beam merging can be performed using beam sections instead of individual beams to further improve performance and reduce attenuation to speech.

Abstract: A system configured to detect a tap event on a surface of a device using microphone audio data and motion data. Instead of using a physical sensor to detect the tap event, the device detects a tap event based on a power level difference between two or more microphones. When a power ratio exceeds a threshold, the device may detect a tap event and perform an action, such as delaying or ending an alarm. To reduce false positives caused by wind or loud noises close to the microphones, the device may confirm a tap event using motion data that indicates actual movement of the device. In some examples, the device may detect the tap event using a neural network processing the microphone data and the motion data. In addition, the device may embed the motion data within the microphone data using unused bits of the microphone data.

Abstract: Some disclosed methods may involve receiving audio reproduction data and determining, based on the audio reproduction data, a sound source location at which a sound is to be rendered. A near-field gain and a far-field gain may be based, at least in part, on a sound source distance between the sound source location and a reproduction environment location. Room speaker feed signals may be based, at least in part, on room speaker positions, the sound source location and the far-field gain. Near-field speaker feed signals may be based, at least in part, on the near-field gain, the sound source location and a position of near-field speakers.

Abstract: The present document describes a method (700) for determining the position of at least one audio source (200). The method (700) includes capturing (701) first and second microphone signals at two or more microphone arrays (210, 220, 230), wherein the two or more microphone arrays (210, 220, 230) are placed at different positions. The two or more microphone arrays (210, 220, 230) each comprise at least a first microphone capsule to capture a first microphone signal and a second microphone capsule to capture a second microphone signal, wherein the first and second microphone capsules have differently oriented spatial directivities. Furthermore, the method (700) comprises determining (702), for each microphone array (210, 220, 230) and based on the respective first and second microphone signals, an incident direction (211, 221, 231) of at least one audio source (200) at the respective microphone array (210, 220, 230).

Abstract: Some disclosed methods may involve receiving audio reproduction data and determining, based on the audio reproduction data, a sound source location at which a sound is to be rendered. A near-field gain and a far-field gain may be based, at least in part, on a sound source distance between the sound source location and a reproduction environment location. Room speaker feed signals may be based, at least in part, on room speaker positions, the sound source location and the far-field gain. Near-field speaker feed signals may be based, at least in part, on the near-field gain, the sound source location and a position of near-field speakers.

Abstract: Some disclosed methods may involve receiving audio reproduction data and determining, based on the audio reproduction data, a sound source location at which a sound is to be rendered. A near-field gain and a far-field gain may be based, at least in part, on a sound source distance between the sound source location and a reproduction environment location. Room speaker feed signals may be based, at least in part, on room speaker positions, the sound source location and the far-field gain. Near-field speaker feed signals may be based, at least in part, on the near-field gain, the sound source location and a position of near-field speakers.

Abstract: The present document describes a method (700) for determining the position of at least one audio source (200). The method (700) includes capturing (701) first and second microphone signals at two or more microphone arrays (210, 220, 230), wherein the two or more microphone arrays (210, 220, 230) are placed at different positions. The two or more microphone arrays (210, 220, 230) each comprise at least a first microphone capsule to capture a first microphone signal and a second microphone capsule to capture a second microphone signal, wherein the first and second microphone capsules have differently oriented spatial directivities. Furthermore, the method (700) comprises determining (702), for each microphone array (210, 220, 230) and based on the respective first and second microphone signals, an incident direction (211, 221, 231) of at least one audio source (200) at the respective microphone array (210, 220, 230).