Sound Field Visualization Using Microphone Array and Event-Driven Calculation
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Solution Overview
Problem
Existing sound field visualization technologies face limitations in ease of use and environmental dependence, requiring specific devices like laser-light generation and photo-detection systems, and struggle with accurate measurement due to interference and unreliable human auditory perception.
Innovation Solution
An information processing device that calculates sound amplitude or phase at multiple positions using positional information and audio signals, detects events, and adjusts calculation intervals to provide dynamic visualization of sound wavefronts using commercially available microphones, enabling accurate visualization of sound pressure distribution without specific apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser-light generation device and photo-detection device are used for sound field visualization, then measurement precision is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent replaces the optical measurement system (laser-light generation device and photo-detection device) with an acoustic measurement system using a microphone array. The microphone array captures sound pressure data at multiple positions, and a calculation unit computes sound field distribution based on this acoustic data, eliminating the need for complex optical equipment while maintaining measurement capability
Solution Approach 2:
The patent employs commercially available microphones in a modular array configuration that can be arranged in various spatial patterns (planar, cylindrical, spherical). This universal approach allows the same basic component to serve multiple measurement scenarios and environments, reducing device complexity while maintaining versatility in sound field visualization applications
2Measurement precision
If laser-light generation device is used for sound field visualization, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent substitutes the specialized optical measurement system with a microphone array system that uses standard acoustic components. The measurement process is simplified through automated data collection and calculation, where the system automatically computes sound field distribution from microphone readings without requiring manual intervention or specialized operation skills
Solution Approach 2:
The system performs self-service through automated processing. The calculation unit automatically computes sound field parameters from the microphone array data, and the visualization unit automatically generates and displays the sound field distribution. This eliminates the need for manual measurement and analysis operations, significantly improving ease of operation while maintaining precision
3Adaptability or versatility
If measurement is performed in general environments, then adaptability is improved, but measurement precision deteriorates due to interference
Solution Approach 1:
The patent divides the measurement system into multiple independent microphone elements arranged in a spatial array. Each microphone captures local sound pressure information, and the calculation unit integrates this segmented data to compute the overall sound field distribution. This segmentation allows the system to operate in complex environments by processing local measurements independently while maintaining global accuracy
Solution Approach 2:
The patent introduces an intermediary calculation unit that processes the raw microphone data to eliminate interference effects. This intermediary layer computes sound field parameters by analyzing the acoustic data mathematically, separating the target sound field information from environmental noise and interference, thereby maintaining measurement precision in general environments
4Productivity
If calculation time interval is reduced for real-time visualization, then productivity is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by updating the sound field visualization at controlled time intervals rather than continuously. The system performs calculations and visualizations at predetermined periods, balancing real-time responsiveness with energy efficiency. This periodic operation allows the system to maintain productivity for dynamic sound field analysis while reducing overall energy consumption compared to continuous processing
Data Source
AI summary
The present technology relates to an information processing device, an information processing method, and a program that enable easier visualization of a sound field.The information processing device includes: a calculation unit configured to calculate, on the basis of positional information indicating a plurality of observation positions in a space and an audio signal of sound observed at each of the plurality of observation positions, an amplitude or phase of the sound at each of a plurality of positions in the space at a first time interval; an event detection unit configured to detect an event; and an adjustment unit configured to perform, in a case where the event is detected, control such that the amplitude or the phase is calculated at a second time interval shorter than the first time interval. The present technology can be applied to a sound-field visualization system.