Sound Transmission Simulation Using Ray Intersection and Refraction Models
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Solution Overview
Problem
Accurately simulating complex sound transmission phenomena in real-world environments with various media and obstacles is challenging due to the complexity of building structures and virtual scenes.
Innovation Solution
A sound transmission method that determines intersection points between sound rays and building walls, estimates a sound transmission model based on these points, and calculates transmission conditions within the walls to simulate 3D spatial audio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex building structures and virtual scenes with various media are simulated, then the realism of sound transmission is improved, but the computational complexity and difficulty of simulation increase
Solution Approach 1:
The patent segments the complex sound transmission problem into distinct components: direct sound rays, reflected sound rays, and refracted sound rays. Each component is modeled separately using specific mathematical formulas, allowing the complex simulation to be broken down into manageable parts that can be computed independently and then combined.
Solution Approach 2:
The patent introduces intermediary mathematical models and transmission coefficients as mediators between the complex physical environment and the computable simulation parameters. These intermediaries (such as transmission loss models, refraction indices, and reflection coefficients) bridge the gap between realistic building structures and tractable computational formulations.
2Reliability
If multiple sound propagation paths (direct, reflected, refracted) are modeled, then the fidelity of acoustic simulation is improved, but the computational resources and time required increase
Solution Approach 1:
The patent performs preliminary classification of sound propagation paths into distinct categories (direct, reflected, refracted) before computation. By pre-defining the mathematical models for each path type and their respective transmission coefficients, the system avoids complex real-time calculations during actual simulation, thereby reducing computation time while maintaining fidelity.
Solution Approach 2:
The patent utilizes parameter changes in transmission coefficients, refraction indices, and reflection coefficients to efficiently model different propagation paths. By adjusting these parameters based on media properties and geometric configurations, the system can rapidly compute multiple paths without requiring complete remodelling, thus reducing computational time.
3Measurement precision
If sound refraction through media with different propagation speeds is simulated, then the accuracy of sound transmission modeling is improved, but the mathematical complexity and computational burden increase
Solution Approach 1:
The patent replaces complex mechanical wave propagation analysis with mathematical substitutions using refraction indices and transmission coefficients. Instead of solving full wave equations for refraction through multiple media, the system uses simplified mathematical relationships (such as Snell's law formulations and transmission loss models) that capture the essential physics while being computationally tractable.
Solution Approach 2:
The patent employs parameter changes in propagation speeds and refraction indices to simplify the mathematical modeling of sound refraction. By expressing refraction effects through parameter transformations rather than full wave field solutions, the system reduces mathematical complexity while maintaining accuracy in modeling sound transmission through different media.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-fidelity simulation of sound transmission in complex environments, effectively addressing the challenge of simulating direct and refracted sound rays in various media and geometric shapes.
Implementation Method 1
the speed of sound propagation is different in different media. At standard atmospheric pressure, the propagation speed of sound in air is 340 m/s, in water 1500 m/s and in steel 5200 m/s
Implementation Method 2
When sound waves propagate from one medium to another, there is a change in the direction of sound propagation. Some sound waves are refracted. The refraction of sound waves is most noticeable when they pass through media with gradually changing properties.
Data Source
AI summary
A sound transmission method. The sound transmission method includes: according to a plurality of rays emitted to the periphery with an sound source as a center, determining an intersection point set of the plurality of rays and a wall of a building; estimating an sound transmission model of the building according to the intersection point set; and, by means of the sound transmission model, estimating a transmission condition in the wall of the sound emitted by the acoustic source. Also disclosed are a sound transmission apparatus, a non-volatile computer-readable storage medium, a computer program, and a computer program product.