Subjective Sound Rendering With Phase-Incoherent Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle simulators face challenges in accurately reproducing sound environments, leading to inconsistent user experiences due to arbitrary audio signal variations and difficulty in maintaining amplitude and frequency requirements for sound rendering.
Innovation Solution
A method and system that utilize two distinct sound emitters positioned in a vehicle simulator to emit pure and noisy sinusoidal audio signals with the same frequency, where the pure signal has a greater amplitude, and a band-pass filter is used to maintain phase incoherence, ensuring consistent sound rendering by dynamically adjusting signal amplitudes and phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sound emitter is used to reproduce sound in a vehicle simulator, then the device complexity is reduced, but the sound rendering consistency and reliability deteriorate due to arbitrary audio signal variations
Solution Approach 1:
The system divides the sound reproduction function into multiple independent sound emitters (at least two), each capable of emitting audio signals. This segmentation allows the system to maintain sound rendering consistency through redundancy and coordination between multiple emitters, resolving the contradiction between device complexity and reliability.
Solution Approach 2:
The system dynamically adjusts parameters such as amplitude and phase of audio signals emitted by different sound emitters. By controlling the amplitude of pure sinusoidal signals to be greater than or equal to noisy signals at the same frequency, and adjusting phases to maintain phase incoherence, the system ensures consistent sound rendering while using multiple emitters.
2Reliability
If multiple sound emitters are used to improve sound rendering consistency, then the reliability improves, but the device complexity increases
Solution Approach 1:
Each sound emitter in the system is designed to perform multiple functions: emitting pure sinusoidal signals, emitting noisy sinusoidal signals, and dynamically adjusting amplitude and phase. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in device complexity while maintaining improved reliability through multiple emitters.
3Stability of the object's composition
If the amplitude of noisy sinusoidal signals is increased to match pure signals, then the energy distribution becomes more uniform, but the subjective sound rendering quality deteriorates
Solution Approach 1:
The system controls the amplitude parameter of noisy sinusoidal signals to be less than or equal to pure sinusoidal signals at the same frequency. This parameter control ensures that pure signals dominate the sound field, maintaining high subjective sound rendering quality while still providing enough noisy signal energy to reduce fluctuations and improve energy distribution uniformity.
4Stability of the object's composition
If the phase coherence between pure and noisy sinusoidal signals is maintained, then the signal stability improves, but the subjective sound perception deteriorates due to arbitrary variations
Solution Approach 1:
The system intentionally creates phase asymmetry or incoherence between pure and noisy sinusoidal signals. By preventing phase alignment, the system avoids arbitrary audio signal variations that would deteriorate subjective sound perception, while still maintaining overall signal stability through controlled amplitude relationships and consistent emission patterns.
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
Enhances subjective sound rendering by minimizing energy fluctuations and maintaining amplitude consistency, thereby improving the realism and reliability of simulated sound experiences.
Implementation Method 1
the step of emitting the second audio signal comprises filtering a noisy signal to obtain the noisy sinusoidal audio signal
Implementation Method 2
the step of filtering of the noisy signal acts as a harmonic resonator having a resonating frequency
Data Source
AI summary
There is provided a method for generating sound within a predetermined environment, the method comprising: concurrently emitting within the predetermined environment: a pure sinusoidal audio signal from a first location; and a noisy sinusoidal audio signal from a second location, wherein: the first location and the second location are distinct; the pure sinusoidal audio signal and the noisy sinusoidal audio signal have a same frequency; and within the predetermined environment, the pure sinusoidal audio signal emitted from the first location has a first amplitude that is equal to or greater than a second amplitude of any other signal having said frequency and concurrently emitted from at least one of the first location and the second location.