Conference Speaker Power and Delay Control for Uniform Volume
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In large conference rooms, listeners often experience varying volumes of speech due to differing distances from speakers, leading to inconsistent audio experiences.
Innovation Solution
A control system and method using a controller to manage multiple speakers and microphones, employing a dynamic causal Bayesian optimization algorithm to adjust output powers and delays based on volume and time delays measured by microphones, ensuring consistent audio levels across the room.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple speakers are arranged in a large conference room to spread voice to various positions, then the coverage area is improved, but the volume consistency deteriorates due to varying distances between speakers and listeners
Solution Approach 1:
The system dynamically adjusts the output power of each speaker in real-time based on the measured volume and time delay parameters. The controller continuously monitors audio signals from microphones and modifies speaker outputs to maintain consistent volume across different positions, transforming the static speaker system into a dynamic adaptive system that compensates for distance variations.
Solution Approach 2:
The system changes the output power parameter of each speaker based on calculated optimization results. By adjusting the power level parameter dynamically according to the specific position and distance of listeners, the system achieves uniform volume distribution throughout the conference room while maintaining the expanded coverage area.
2Area of stationary object
If speakers are positioned at different distances from listeners, then the coverage area is improved, but the time delay varies causing audio synchronization issues
Solution Approach 1:
The system performs preliminary measurement of time delay parameters by having microphones capture audio signals from speakers at different positions. Based on these pre-measured values, the controller calculates optimal output delays for each speaker before actual audio reproduction, allowing the system to compensate for distance-induced time delays in advance and maintain audio synchronization across the entire coverage area.
3Reliability
If the output power of speakers is increased to ensure clear audio for distant listeners, then the audibility for distant listeners is improved, but the overall volume consistency deteriorates due to proximity effects
Solution Approach 1:
The system applies different output power levels to different speakers based on their specific positions and the measured audio characteristics at various locations. Instead of uniform high power output, each speaker is optimized locally to deliver appropriate power levels that ensure clear audio for distant listeners while preventing excessive volume for nearby listeners, achieving both reliability and precision simultaneously.
Data Source
AI summary
A control system and a control method for speakers in a field are provided. The control method includes: outputting an audio signal by a first speaker corresponding to a first output power and a second speaker corresponding to a second output power; measuring a first volume and a first time delay corresponding to the audio signal by a first microphone; performing a calculation of an optimization algorithm according to the first output power, the second output power, the first volume, and the first time delay to obtain a first recommended output power corresponding to the first speaker and a second recommended output power corresponding to the second speaker; and configuring the first output power according to the first recommended output power, and configuring the second output power according to the second recommended output power.