Speaker Acoustic Correction for Reflected Sound Compensation
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Solution Overview
Problem
Existing speaker systems face degradation in sound quality due to the effect of reflected sound from objects like walls, which affects acoustic characteristics and frequency response, making it challenging to maintain uniform sound quality across different listener positions in a room.
Innovation Solution
A signal processing method and speaker system that utilize a processor to acquire reflected sound information, calculate correction coefficients, and correct acoustic characteristics using a measurement microphone, allowing for the reduction of reflected sound impact while maintaining wide directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If speakers with wide directivity are used to provide uniform sound quality across different listener positions, then sound distribution is improved, but the effect of reflected sound from walls and objects significantly degrades frequency characteristic and sound quality
Solution Approach 1:
The system performs preliminary measurement of reflected sound characteristics using a measurement microphone before actual music playback. Correction coefficients are calculated in advance based on the measured reflected sound information, allowing the system to pre-compensate for reflected sound effects and maintain uniform frequency characteristics across different listener positions
Solution Approach 2:
The system uses a measurement microphone to capture reflected sound information and feeds this information back to the processor. The processor calculates correction coefficients based on this feedback and applies them to correct the acoustic characteristics of the speakers, creating a closed-loop system that continuously optimizes sound quality by compensating for reflected sound effects
Data Source
AI summary
A method is provided for causing a processor included in a speaker system to execute operations. The operations include acquiring, using a measurement microphone, reflected sound information regarding an effect of sounds that are played back by a plurality of speakers having predetermined directivity and that are reflected off an object, where the plurality of speakers are included in the speaker system. The operations also include calculating correction coefficients used to correct acoustic characteristics of the plurality of speakers on the basis of the acquired reflected sound information. The operations further include correcting the acoustic characteristics of the plurality of speakers using the calculated correction coefficients.