Back-to-Back Headrest Speakers for Audio Crosstalk Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing stereophonic reproduction systems face challenges in reducing crosstalk components between left and right ear signals, particularly in systems using headrest speakers, where the arrangement of speaker arrays is restricted and effective crosstalk reduction is not adequately achieved.
Innovation Solution
The use of at least two speakers arranged back-to-back, with specific configurations such as primary and secondary speakers, to provide directivity to left and right ear signals, allowing for bidirectional or unidirectional sound propagation, thereby reducing crosstalk components without the need for extensive speaker arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a speaker array is used to reproduce user-specific audio signals for each seat, then different users can hear different audio signals through directivity, but the speaker array arrangement is restricted and requires speakers to be positioned between at least two listening positions
Solution Approach 1:
The invention divides the audio reproduction system into independent speaker units, where each speaker can individually reproduce audio signals with specific directivity patterns. This segmentation allows each speaker to serve multiple users simultaneously with different audio content, eliminating the need for a rigid speaker array configuration and enabling flexible placement anywhere in the listening space.
2Device complexity
If conventional headrest speakers are used for stereophonic reproduction, then the system structure is simple, but crosstalk components between left and right ear signals cannot be effectively reduced
Solution Approach 1:
The invention applies different directivity characteristics to different speakers based on their spatial positions and functions. Each speaker is configured with specific directivity patterns tailored to its location, allowing precise control of sound propagation directions. This local optimization enables effective crosstalk reduction while maintaining simple system structure, as each speaker independently manages its sound field without requiring complex array configurations.
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 configuration effectively minimizes crosstalk between left and right ear signals, allowing for favorable stereophonic reproduction (virtual surround) without the positional restrictions of traditional speaker arrays, while maintaining sound quality.
Implementation Method 1
gives directivity to a left ear signal and a right ear signal and reproduces the left ear signal and the right ear signal by using at least two speakers arranged back-to-back
Implementation Method 2
the directivity given to the left ear signal and the directivity given to the right ear signal may be bidirectional directivity or unidirectional directivity
Data Source
AI summary
To favorably reduce crosstalk components output from respective speakers that reproduce left and right ear signals.Directivity is given to a left ear signal and a right ear signal and the left ear signal and the right ear signal are reproduced by using at least two respective speakers arranged back-to-back to reduce crosstalk components. For example, the speaker may be a speaker installed in a headrest or a seat provided with the headrest. For example, the directivity given to the left ear signal and the directivity given to the right ear signal may be bidirectional directivity or unidirectional directivity.