3D Sound Playback Using Feedback Compensation
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Solution Overview
Problem
Existing methods for reproducing stereophonic sound using a single speaker are limited, particularly when the listener moves or the distance between the listener and the speaker changes, and cannot effectively provide directional audio like headphones.
Innovation Solution
A method and device that use a portable device with a speaker and microphone to receive audio signals with directionality information, process these signals using a compensation parameter, and output them to both the portable speaker and an external speaker to create a stereophonic sound experience, even when the listener's location changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single speaker is used to play stereophonic sound, then device complexity is reduced, but directional accuracy deteriorates when listener moves or distance changes
Solution Approach 1:
The system uses a microphone to capture the actual sound output from the speaker and feeds it back to the processor. This feedback loop allows the system to measure the real-world acoustic environment and adjust the compensation parameters dynamically, maintaining directional accuracy even when the listener moves or distance changes.
Solution Approach 2:
The system dynamically changes the compensation parameters based on the measured acoustic environment. By adjusting these parameters in real-time according to the feedback from the microphone, the system maintains stereophonic sound quality and directional accuracy despite changes in listener position or distance.
2Measurement precision
If headphones are used to provide directional audio, then directional accuracy is improved, but device complexity and portability deteriorate
Solution Approach 1:
The invention extracts the directional audio capability from the headphone form factor and implements it using a portable speaker system with feedback processing. By taking out the essential function of directional sound reproduction and implementing it through a different configuration (speaker + microphone + processor), the system achieves headphone-like directional accuracy without the portability constraints of headphones.
3Adaptability or versatility
If speaker distance or listener position changes, then adaptability is improved, but directional accuracy deteriorates in existing systems
Solution Approach 1:
The system transitions from a static configuration to a dynamic one by continuously measuring the acoustic environment through the microphone and adjusting the compensation parameters in real-time. This dynamic adaptation allows the system to maintain directional accuracy regardless of changes in listener position or speaker distance.
Solution Approach 2:
The feedback mechanism enables the system to detect changes in listener position or speaker distance and automatically adjust the sound output parameters to compensate for these changes, thereby maintaining directional accuracy across different positions and distances.
Data Source
AI summary
The present invention relates to a device and a method for playing 3D sound by means of a speaker and one or more microphones. A method for playing 3D sound according to the present invention comprises the steps of: receiving through wire or wireless communication a first signal which is an audio signal comprising any one of left direction information and right direction information and a second signal which is an audio signal comprising the other one of the left direction information and the right direction information; receiving through microphones a third signal that is being output from an external speaker; determining, on the basis of a fourth signal that is to be output from the speaker; and generating the fourth signal from the second signal by means of the determined variable.