Audio System Natural Sound Field via Delayed Secondary Channel
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Solution Overview
Problem
Conventional audio systems produce unnatural surround sound due to electronic audio mixing, leading to an unnatural perception of the audio signal.
Innovation Solution
An audio system with sound-field-type nature sound effect is designed, featuring primary and secondary signal channels with separate sound field control devices that introduce a delay period between audio signals, allowing mixing in a natural environment without electronic mixing, utilizing operational amplifiers, high-pass filters, and voice coils for low-pass filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electronic audio mixing is used to produce surround sound, then the audio signal processing is efficient and controllable, but the output audio signal becomes unnatural and artificial
Solution Approach 1:
The patent removes the electronic audio mixing process from the system entirely. Instead of using an audio mixer to combine signals, the system directly outputs the primary audio signal to the playing device, allowing the natural acoustic environment to perform the mixing function, thereby eliminating the artificial character caused by electronic mixing while maintaining processing efficiency
Solution Approach 2:
The patent introduces a delay circuit as an intermediary element between the audio signal source and the playing device. This delay circuit processes the audio signal in the time domain rather than through electronic mixing, creating a natural reverb effect that enhances the authenticity of the audio output while maintaining system controllability
2Productivity
If audio signals are mixed electronically before playing, then the mixing process is precise and efficient, but the sound field effect becomes artificial and less immersive
Solution Approach 1:
The patent replaces the mechanical/electronic audio mixing system with a time-based delay processing system. Instead of using an audio mixer to combine signals electronically, the system uses a delay circuit to create temporal separation between direct and reflected sound paths, allowing natural acoustic mixing to occur in the sound field, thereby improving both efficiency and naturalness
Solution Approach 2:
The patent changes the processing parameter from frequency-domain electronic mixing to time-domain delay processing. By adjusting delay time and using simple filtering instead of complex mixing operations, the system achieves natural sound field effects while maintaining processing efficiency and reducing computational complexity
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
This approach enhances the naturalness of the audio output by eliminating artificial mixing, creating a more immersive sound field experience with adjustable delay periods and improved sound quality.
Implementation Method 1
a first playing delay period exists between the playing of the first secondary audio signal and the playing of the primary audio signal
Implementation Method 2
a first high-pass filter connected to the first attenuator from behind
Implementation Method 3
the first sound field control playing device has a low-pass filtering function
Data Source
AI summary
An audio system with sound-field-type nature sound effect includes: a first primary channel playing device for playing a primary audio signal generated according to a left channel audio signal and/or a right channel audio signal; a first secondary signal circuit for generating a first secondary audio signal according to the left channel audio signal and the right channel audio signal; and a first sound field control playing device connected to the first secondary signal circuit and adapted to play the first secondary audio signal; wherein a first playing delay period exists between the playing of the first secondary audio signal and the playing of the primary audio signal; wherein the first secondary audio signal played by the first sound field control playing device does not undergo audio mixing with the primary audio signal by a first audio mixing circuit.