Device-Specific Room Impulse Response Generation via Transfer Function Segmentation
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Solution Overview
Problem
Current acoustic simulation tools, particularly wave-based solvers, face challenges in efficiently simulating acoustic waves due to complexity and computational constraints, which results in long simulation times and inability to effectively handle complex geometries and wave-based phenomena like standing waves.
Innovation Solution
The method involves performing separate simulations to generate device-specific room impulse responses (DSRIR) by combining device-related transfer functions (DRTF) and spatial room impulse responses (SRIR) in two distinct steps, allowing for efficient parallelization and reducing simulation time without compromising fidelity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wave-based simulations are used to simulate acoustic waves with high fidelity, then measurement precision is improved, but simulation time increases significantly due to computational complexity
Solution Approach 1:
The patent segments the acoustic simulation into two independent parts: device-related transfer functions (DRTF) and spatial room impulse responses (SRIR). The DRTF characterizes the audio device in isolation, while the SRIR characterizes the room acoustics. These segmented components are computed separately and then combined through convolution to produce the final device-specific room impulse response, dramatically reducing overall simulation time while maintaining wave-based accuracy.
2Measurement precision
If complex geometries are included in the 3D model for accurate acoustic simulation, then measurement precision is improved, but simulation time increases due to meshing requirements
Solution Approach 1:
The patent separates the geometric modeling into two segments: the audio device geometry and the room geometry. The device is modeled with fine meshing to capture complex geometries and microphone positions accurately, while the room is modeled with coarser meshing suitable for wave-based acoustic propagation. This segmentation allows each geometry to be optimized independently, reducing overall computational burden.
Solution Approach 2:
The patent extracts the device-related acoustic characteristics (DRTF) from the full device-room system. By computing the DRTF in isolation without requiring the full room mesh, the method eliminates the computational burden of meshing complex room geometries with fine detail, while still capturing the essential acoustic behavior of the device.
3Productivity
If separate simulations are performed for device and room, then productivity is improved, but device complexity increases due to multiple simulation steps
Solution Approach 1:
The patent merges the results of separate device and room simulations through convolution of the DRTF and SRIR. This combining step integrates the two independently computed components into a unified device-specific room impulse response, achieving the accuracy of a full coupled simulation with the efficiency of separate computations.
Solution Approach 2:
The patent creates a simplified digital representation of the audio device (device mesh model with microphone positions) that can be used repeatedly to generate DRTF for different room configurations. This copied device model eliminates the need to re-simulate the device geometry for each room, significantly improving productivity when evaluating multiple room scenarios.
Data Source
AI summary
A computer-implemented method for generating a device-specific room impulse response (DSRIR) describing an acoustic characteristic of a device and a room as received by the device includes: generating an at least first device-related transfer function (DRTF), wherein the at least first device related transfer function describes the acoustic characteristic of the device as received by the at least first microphone; generating a spatial room impulse response (SRIR), wherein the spatial room impulse response describes the acoustic characteristic of the room from at least one room sound source in the room and received at an at least one listening point in the room from at least one direction; and generating the device specific room impulse response (DSRIR) by combining the device related transfer function and the spatial room impulse response.