公开(公告)号：US11170139B1

公开(公告)日：2021-11-09

申请号：US15900862

申请日：2018-02-21

Applicant: Apple Inc.

Inventor： Dirk Schroeder ,  Soenke Pelzer

IPC: G06T15/06 ,  G06F30/20 ,  G06F17/18

Abstract: This disclosure relates to techniques for generating physically accurate auralization of sound propagation in complex environments, while accounting for important wave effects, such as sound absorption, sound scattering, and airborne sound insulation between rooms. According to some embodiments, techniques may be utilized to determine more accurate, e.g., “acoustically-effective” room volumes that account for open windows, open doors, acoustic dead space, and the like. According to other embodiments disclosed herein, techniques may be utilized to perform optimized hybrid acoustical ray tracing, including grouping coherent rays by processing core. According to other embodiments disclosed herein, techniques may be utilized to translate simulated ray tracing results into natural-sounding reverberations by deriving and resampling spatial-time-frequency energy probability density functions that more accurately account for the laws of physics and then converting this data into a spatial impulse response function, which may then be used for realistic 3D audio reproduction, e.g., via headphones or loudspeakers.

公开(公告)号：US11070933B1

公开(公告)日：2021-07-20

申请号：US16942680

申请日：2020-07-29

Applicant: Apple Inc.

Inventor： Dirk Schroeder ,  Jonathan D. Sheaffer ,  Soenke Pelzer ,  Juha O. Merimaa

IPC: H04S7/00 ,  H04R3/04 ,  H04R5/033 ,  H04S1/00 ,  H04R5/04

Abstract: A computer system having an electronic device determines a listener position within a computer-generated reality (CGR) setting that is to be aurally experienced by a user of the electronic device through at least one speaker. The system determines a source position of a virtual sound source within the CGR setting and determines a characteristic of a virtual object within the CGR setting, where the characteristic include a geometry of an edge of the virtual object. The system determines at least one edge-diffraction filter parameter for an edge-diffraction filter based on 1) the listener position, 2) the source position, and 3) the geometry. The system applies the edge-diffraction filter to an input audio signal to produce a filtered audio signal that accounts for edge-diffraction of sound produced by the virtual sound source within the CGR setting.