Adaptive Loudspeaker Equalization for Aging Compensation
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Solution Overview
Problem
Loudspeaker aging and environmental changes lead to variations in electro-acoustical characteristics, making it challenging to maintain optimal audio quality, as existing equalization methods provide static parameters that are ineffective in compensating for these variations.
Innovation Solution
A signal processor dynamically adapts equalization parameters by monitoring physical parameters of loudspeakers using transducer elements and a processor block that includes an efficiency detector and parameter calculator, enabling a variable multi-band equalizer to adjust and compensate for frequency response changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static equalization parameters are used to compensate loudspeaker frequency response, then initial audio quality can be improved, but the system cannot adapt to aging phenomena and environmental changes over time
Solution Approach 1:
The patent implements dynamic equalization parameters that continuously adapt to loudspeaker aging and environmental changes. The system uses real-time monitoring of speaker characteristics and automatically adjusts equalization parameters, transforming the static equalization system into a dynamic one that maintains optimal audio quality throughout the loudspeaker's lifecycle.
Solution Approach 2:
The system incorporates feedback mechanisms where the actual loudspeaker performance is measured and compared against reference values. Based on this feedback, the equalization parameters are automatically adjusted to compensate for aging effects, ensuring consistent audio quality over time.
2Adaptability or versatility
If transducer elements and processor blocks are added to monitor and adjust loudspeaker parameters, then adaptive equalization is achieved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into unified components. The signal processor performs both monitoring and equalization adjustment functions, while transducer elements serve both as loudspeakers and as sensors for monitoring their own performance characteristics, reducing the need for separate dedicated components.
Solution Approach 2:
The system uses the loudspeaker itself as the monitoring sensor through integrated transducer elements, eliminating the need for separate external measurement devices. The loudspeaker monitors its own performance and feeds this information back to the processor for automatic adjustment.
3Manufacturing precision
If equalization parameters are tuned for specific speaker sets, then audio quality is optimized for those speakers, but the parameters become ineffective for different speaker sets with varying characteristics
Solution Approach 1:
The system employs dynamic equalization parameters that automatically adapt to different loudspeaker characteristics rather than using fixed parameters tuned for specific speaker sets. This allows the same system to optimally compensate for various speaker types and aging stages without requiring manual re-tuning.
Solution Approach 2:
The system continuously adjusts equalization parameters based on real-time measurements of loudspeaker characteristics. By changing parameters dynamically according to actual speaker performance, the system maintains effective compensation across different speaker sets and conditions.
Data Source
AI summary
A signal processor including an equalizer responsive to an input signal and to a parameter signal, said equalizer configured to provide an output signal to an electro-acoustical transducer for compensating a frequency response of said electro-acoustical transducer; a transducer element for monitoring at least a physical parameter of said electro-acoustical transducer, said transducer element configured to provide a transducer signal, a processor block responsive to said transducer signal, configured to provide said parameter signal.