Software Equalization for Audio Impedance Interactions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Impedance interactions between audio source devices and output devices alter the frequency response, leading to inconsistent sound perception across different device pairings, with existing solutions focusing on hardware modifications and lacking software-based solutions.
Innovation Solution
A software-based equalization method that measures the complex impedance of both devices, determines the frequency response interaction, generates an inverse equalization, and applies it to the audio signal to maintain consistent acoustic responses without requiring hardware modifications, using a cloud-based or locally stored database for various device pairings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hardware modifications are made to source or output devices to correct impedance interactions, then frequency response consistency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces hardware modifications with a software-based equalization system. Instead of physically modifying the electrical or acoustical design of source or output devices, the invention uses digital signal processing to measure impedance characteristics and apply corrective equalization filters, thereby achieving frequency response consistency without hardware changes
Solution Approach 2:
The invention changes the electrical parameters of the audio signal through software equalization. By measuring the actual impedance characteristics of source and output devices and applying corrective equalization filters, the system adjusts the frequency response parameters to compensate for impedance interactions, achieving consistent sound perception across different device pairings
2Manufacturing precision
If hardware modifications are made to correct impedance interactions, then frequency response consistency is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive hardware modifications with cost-effective software equalization. Instead of redesigning electrical circuits or acoustical components of source or output devices, the invention uses digital signal processing algorithms that can be implemented through software, significantly reducing manufacturing costs while achieving the same frequency response consistency
3Device complexity
If software-based equalization is applied to correct impedance interactions, then device complexity is reduced, but measurement and processing requirements increase
Solution Approach 1:
The invention enables source and output devices to self-characterize their impedance properties. The system automatically measures the frequency response characteristics of the devices and uses this information to generate appropriate equalization filters, eliminating the need for manual measurement or complex external testing equipment
Solution Approach 2:
The patent implements a feedback-based equalization system that measures the actual frequency response of source-output device combinations and uses this information to adjust the equalization parameters. This closed-loop approach automatically adapts to different device pairings, simplifying the measurement and processing requirements
Data Source
AI summary
A software-based equalization method corrects for effects of impedance interactions of a source device and an output device, on an aggregate frequency response, in audio playback of a system. The correction results in perceived sound remaining consistent from any source device and output device combination. The method does not require any hardware modifications and a cloud-based database of source devices and output devices provides corrections for a wide array of possible device pairings.