Impulse Response Generation for Real-Time Environmental Audio Adaptation
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Solution Overview
Problem
Existing audio reproduction systems struggle to adapt audio content to the unique environments of individual users, making it difficult for content creators to generate accurate audio experiences that match the user's surroundings, especially in dynamic settings like augmented reality and virtual reality.
Innovation Solution
A dynamic impulse response generation process that utilizes known sounds within the environment, capturing and processing audio to create an impulse response that can be convolved with input sound to modify it for accurate reproduction, using devices with integrated audio emitting and detection units or user-generated sounds to simplify the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional audio reproduction systems are used, then audio content can be played back, but the audio cannot be adapted to match the user's specific environment
Solution Approach 1:
The system automatically captures environmental audio characteristics and generates impulse responses without requiring manual setup or professional equipment. The audio emitting unit and detection unit work together to self-calibrate the audio reproduction to the user's environment, eliminating the need for complex manual configuration procedures
Solution Approach 2:
The audio emitting unit serves multiple functions: it plays back audio content for the user and simultaneously emits test signals for environmental characterization. The audio detection unit similarly serves dual purposes of capturing user audio and measuring environmental acoustic properties. This multi-functionality reduces the need for separate dedicated measurement equipment
2Measurement precision
If content creators attempt to generate accurate audio for multiple environments, then audio accuracy improves, but the complexity and time required increases significantly
Solution Approach 1:
The system dynamically adapts audio reproduction in real-time based on the captured environmental characteristics. Rather than requiring pre-generation of audio for multiple fixed environments, the impulse response generation occurs on-demand, allowing the system to adapt to any environment instantly without lengthy preparation
Solution Approach 2:
The system changes the acoustic parameters of the audio output by convolving the original audio with environment-specific impulse responses. This allows the same audio content to be accurately reproduced across diverse environments by modifying only the acoustic parameters rather than recreating the entire audio content
3Measurement precision
If professional audio measurement equipment is used, then measurement precision improves, but device complexity and cost increase
Solution Approach 1:
Existing audio devices such as headphones, speakers, and microphones are utilized for dual purposes: both for normal audio reproduction and for environmental measurement. This eliminates the need for separate professional measurement equipment while achieving sufficient accuracy for the application
Solution Approach 2:
The system creates a digital copy of the environmental acoustic characteristics through impulse response measurement. This digital representation captures the essential acoustic properties of the environment without requiring physical modification of the space or use of complex measurement apparatus
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 immersive audio experiences by adapting sound to match the user's environment, providing more realistic and engaging audio reproduction in various settings without requiring complex professional equipment.
Implementation Method 1
an audio emitting unit operable to emit a predetermined sound in the environment
Implementation Method 2
a difference between the predetermined sound and the recorded sound
Implementation Method 3
capturing and processing audio to create an impulse response that can be convolved with input sound to modify it for accurate reproduction
Data Source
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Figure 5~6
AI summary
A system for determining the impulse response of an environment, the system comprising an audio emitting unit operable to emit a predetermined sound in the environment, an audio detection unit operable to record the sound output by the audio emitting unit, and an impulse response generation unit operable to identify an impulse response of the environment in dependence upon a frequency response of the audio emitting unit and/or the audio detection unit, and a difference between the predetermined sound and the recorded sound.