Abstract: In one aspect, there is a method for rendering a spatially-heterogeneous audio element. In some embodiments, the method includes obtaining two or more audio signals representing the spatially-heterogeneous audio element, wherein a combination of the audio signals provides a spatial image of the spatially-heterogeneous audio element. The method also includes obtaining metadata associated with the spatially-heterogeneous audio element, the metadata comprising spatial extent information indicating a spatial extent of the audio element. The method further includes rendering the audio element using: i) the spatial extent information and ii) location information indicating a position (e.g. virtual position) and/or an orientation of the user relative to the audio element.

Abstract: The present disclosure provides a method for preparing plastic composites containing a plant fiber. The method includes providing a first raw material containing the plant fiber and a second raw material containing plastics; pretreating the first raw material; heating the pretreated first raw material for carbonization; and mixing the carbonized first raw material with the second raw material to form a composite material. The first raw material may be coffee grounds, and the pretreatment of coffee grounds includes: washing the first raw material with water to remove contaminants and water-soluble compounds, drying the washed first raw material, extracting the oily substance from the dried first raw material using a solvent, obtaining the extracted oily substance from the first raw material; and completely removing the solvent from the extracted first raw material.

Abstract: A method of audio rendering. The method includes receiving an audio element, wherein the audio element comprises: i) an interior representation that is valid within a spatial region, the interior representation of the audio element being in a listener-centric format and ii) information indicating the spatial region. The method further includes determining that a listener is outside the spatial region. The method further includes deriving an exterior representation of the audio element and rendering the audio element using the exterior representation of the audio element. In another aspect, a method of providing a spatially-bounded audio element is provided. The method includes providing, to a rendering node, an audio element. The audio element includes: (i) an interior representation that is valid within a spatial region, the interior representation being in a listener-centric format; and (ii) information indicating the spatial region.