Stereo Speaker Frequency Correction for Balanced Channel Output

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional speaker devices, such as guitar amplifiers, struggle to accurately reproduce stereo audio signals due to variations in transfer characteristics between left and right speakers, which can lead to imbalanced sound emission.

Innovation Solution

A speaker device with a correction part that adjusts the frequency characteristics of stereo audio signals to match predetermined transfer characteristics for the left and right speakers, allowing for consistent and balanced sound emission in both monaural and stereo modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If stereo audio signals are supplied to left and right speakers without correction, then the speaker device can operate in stereo mode, but the transfer characteristics of the left and right speakers become unbalanced

Engineering Contradiction:

Improvestereo mode operationVSAvoidtransfer characteristics balance

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The correction part changes the frequency characteristics parameter of the stereo audio signal by applying different gain adjustments to left and right channels, transforming the signal parameters to compensate for speaker transfer characteristic variations and achieve balanced sound output

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If frequency characteristics correction is applied to stereo audio signals, then transfer characteristics balance is improved, but device complexity increases

Engineering Contradiction:

Improvetransfer characteristics balanceVSAvoidcorrection part structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The correction part is designed to handle multiple functions: it processes both monaural and stereo audio signals, performs frequency characteristic correction, and adapts to different speaker configurations, making a single component responsible for multiple audio processing tasks

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of manufacture

If the same transfer characteristics are applied to all speakers, then manufacturing is simplified, but sound quality varies across different speaker types

Engineering Contradiction:

Improvespeaker uniformityVSAvoidsound quality consistency

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The correction part applies different frequency characteristic corrections to different speakers based on their individual transfer characteristics, allowing each speaker to be optimized for its specific properties while maintaining overall system balance and sound quality consistency

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12225364B2Speaker device and control method thereof

Publication Date: 2025.02.11 ROLAND CORP

AI summary

A speaker device includes left and right speakers and a correction part. The correction part corrects frequency characteristics of a stereo audio signal supplied to the left and right speakers so that transfer characteristics of the left and right speakers become predetermined transfer characteristics.