Speaker Array Delay Control for Moving Listener Sound Fields
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Solution Overview
Problem
Existing speaker arrays fail to maintain optimal sound field effects when users move, as sound transmitted by distant speakers arrives slower, compromising stereo and surround sound experiences.
Innovation Solution
A method and system that adjust the playback timing of audio signals for each speaker in the array based on the listener's position, calculating delay times using distance information and sound speed to ensure synchronized sound delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If speakers in the array play audio signals simultaneously, then the system is simple to operate, but the sound field effect deteriorates when the user moves from the center position
Solution Approach 1:
The patent implements dynamic delay adjustment where each speaker's playback timing is automatically adjusted based on the real-time position of the listener. The system continuously tracks user position and modifies the delay parameters of each speaker dynamically, transforming a static simultaneous playback system into an adaptive dynamic system that maintains optimal sound field effects regardless of user position.
Solution Approach 2:
The system changes the playback parameter (delay time) of each speaker based on the listener's position relative to each speaker. By calculating the distance between the listener and each speaker, the system adjusts the delay parameter to compensate for distance differences, ensuring that sound from all speakers arrives at the listener's ears simultaneously, thus resolving the contradiction between operational simplicity and sound field consistency.
2Device complexity
If speakers farther from the user play at the same time as closer speakers, then the audio signal transmission is simplified, but the sound arrival time difference compromises the stereo and surround sound effects
Solution Approach 1:
The system performs preliminary delay adjustment on audio signals before they reach the speakers. By pre-calculating the required delay times based on listener position and applying these delays to each speaker's audio signal in advance, the system ensures that all sounds arrive at the listener simultaneously. This preliminary action approach simplifies the overall system while achieving precise sound field synchronization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances user experience by maintaining optimal sound field effects regardless of the listener's position, ensuring synchronized audio playback across the speaker array.
Implementation Method 1
obtaining a delay time that corresponds to each of the speakers based on the distance information
Data Source
AI summary
A method for controlling the sound field of speaker arrays is provided. The method includes obtaining a position of a listener and distance information between the position and one or more speaker arrays, wherein each of the one or more speaker arrays includes a plurality of speakers. The method includes obtaining a delay time that corresponds to each of the speakers based on the distance information. The method includes processing audio signals according to the delay times corresponding to the speakers and outputting the audio signals to the speaker arrays.