Far-Field Speaker Audio Adjustment Using Inverted Hearing Transfer Function
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Solution Overview
Problem
Current audio systems, such as mini speakers, struggle to provide accurate audio bandwidth, volume, and directionality, making it difficult to recreate realistic spatial sound effects, especially in game scenes that require immersive 3D surround sound experiences.
Innovation Solution
A method and host system that control far-field and near-field speakers to adjust audio signals based on hearing transfer functions, where the far-field speaker's audio signal is inverted to suppress directionality, allowing for balanced volume adjustment between the two speakers, enhancing the hearing experience by eliminating sound directionality and improving volume balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a far-field speaker is used to provide spatial sound effects, then the audio bandwidth and directionality are improved, but the volume balance and hearing consistency deteriorate due to distance and directional variations
Solution Approach 1:
The patent applies hearing transfer function inversion by obtaining the hearing transfer function from the far-field speaker to the audio receiver, inverting this function, and applying it to the audio signal. This inversion process compensates for the directional and distance-related audio variations, transforming the sound field characteristics to achieve consistent volume and spatial distribution regardless of user position or speaker direction
Solution Approach 2:
The patent dynamically adjusts audio parameters including volume, frequency response, and spatial distribution by applying the inverted hearing transfer function. This parameter transformation compensates for the physical limitations of far-field speakers, maintaining consistent audio characteristics across different listening positions and directions
2Adaptability or versatility
If mini speakers with head related transfer function and 3D surround effects are used, then virtual world sound effects are achieved, but the audio bandwidth, volume and directionality cannot approach real sounds due to physical limitations
Solution Approach 1:
The patent introduces the hearing transfer function as an intermediary mathematical model that characterizes the acoustic path from the far-field speaker to the audio receiver. By obtaining, inverting, and applying this transfer function, the system compensates for the physical limitations of mini speakers, enabling them to produce audio quality that approaches real sound characteristics
Solution Approach 2:
The patent transforms the audio signal parameters by applying the inverted hearing transfer function, adjusting frequency response, phase, and spatial distribution. This parameter transformation allows mini speakers to overcome their physical limitations and reproduce sound characteristics closer to real-world audio
3Reliability
If the far-field speaker volume is increased to compensate for distance, then the hearing volume is improved, but the directionality and spatial accuracy are lost
Solution Approach 1:
The patent simultaneously adjusts multiple audio parameters including volume, frequency response, and spatial distribution through the inverted hearing transfer function. This coordinated parameter transformation allows the system to increase hearing volume while preserving directional accuracy and spatial characteristics, rather than treating these parameters independently
Data Source
AI summary
The disclosure provides a method and a host for adjusting audio of speakers, and a computer readable medium. The method includes: controlling a far-field speaker to play a first audio signal; controlling an audio receiver to receive the first audio signal from the far-field speaker and accordingly positioning a speaker location of the far-field speaker; establishing a first hearing transfer function related to the far-filed speaker based on the speaker location of the far-filed speaker; controlling the far-field speaker to play a second audio signal based on a second hearing transfer function; controlling the audio receiver to receive the second audio signal and accordingly estimating a first reference hearing volume; obtaining a second reference hearing volume corresponding to a first near-field speaker; and adjusting a first volume of the far-field speaker based on the first reference hearing volume and the second reference hearing volume.