Multi-Speaker Volume Equalization by Position-Based Feedback
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Solution Overview
Problem
Existing methods fail to equalize acoustic signals emitted from multiple loudspeakers at a given position due to differences in power output and relative speaker positions, leading to varying volume levels perceived by a user.
Innovation Solution
A method that adjusts operating parameters of loudspeakers based on their relative positions to a sound receiving device, using wireless communication technology like Bluetooth for triangulation to determine distances, and iteratively adjusts signal magnitudes until a predefined threshold is met, ensuring balanced sound levels across speakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple loudspeakers with different power outputs are connected, then the system can provide greater overall sound output, but the volume levels perceived by the user will vary across different loudspeakers
Solution Approach 1:
The system changes the operating parameters (volume levels) of each loudspeaker based on its measured acoustic output. The control unit adjusts individual loudspeaker parameters to compensate for differences in power output, ensuring consistent perceived volume across all speakers while maintaining their different hardware specifications
Solution Approach 2:
The system uses a feedback mechanism where the sound receiving device measures the actual acoustic signal magnitude from each loudspeaker, and this measurement is fed back to the control unit which then adjusts the operating parameters accordingly. This closed-loop control ensures volume consistency despite hardware variations
2Adaptability or versatility
If the position of loudspeakers varies relative to the user, then the system can be more flexible in placement, but the perceived volume levels will differ due to distance variations
Solution Approach 1:
The system determines the relative position of each loudspeaker to the sound receiving device and adjusts the operating parameters (volume levels) accordingly. Loudspeakers farther away are assigned higher volume parameters while closer ones use lower parameters, compensating for distance variations and maintaining consistent perceived volume across flexible placements
Solution Approach 2:
The system performs preliminary measurements of the acoustic signals and relative positions before finalizing the operating parameters. By measuring and adjusting parameters in advance based on predicted position and output variations, the system prepares the optimal configuration before actual use, ensuring volume consistency from the start
3Ease of operation
If manual adjustment of each loudspeaker's volume is performed, then volume levels can be equalized, but the process becomes time-consuming and complex
Solution Approach 1:
The system performs self-service by automatically measuring the acoustic signals from each loudspeaker, determining their relative positions, and adjusting their operating parameters without requiring manual intervention. The control unit autonomously equalizes volume levels across all loudspeakers, eliminating the need for time-consuming manual adjustment while achieving consistent volume output
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
Achieves balanced sound levels at the user's position by dynamically adjusting speaker outputs, providing a consistent audio experience regardless of speaker specifications or positioning.
Implementation Method 1
the position of the sound receiving device is determined by triangulation
Implementation Method 2
acoustic signals emitted from multiple loudspeakers
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a method for adjustment of acoustic signals of multiple loudspeakers (102, 103) at the position of a sound receiving device (101) comprising: determining, in a measuring step (207), for each of the multiple loudspeakers (102, 103), a position of the respective loudspeaker relative to the position of the sound receiving device (101), adapting, in an adjustment step (208), at least one operating parameter related to a magnitude of the acoustic signal of the loudspeaker, for at least one of the multiple loudspeakers (102, 103), based on the positions of the multiple loudspeakers (102, 103) relative to the sound receiving device (101), so as to adjust the magnitude of the acoustic signal, for the multiple loudspeakers (102, 103) at the position of the sound receiving device, determining, in a validation step, for each of the multiple loudspeakers (102, 103), a magnitude of the acoustic signal of the loudspeaker at the position of the sound receiving device, by means of the sound receiving device (101), and, if a difference between the magnitudes of at least two of the multiple loudspeakers (102, 103), at the position of the sound receiving device exceeds a pre-defined threshold, repeating the adjustment step.