Acoustic Device Headrest Partition for Crosstalk Reduction
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Solution Overview
Problem
Conventional stereophonic reproduction systems face challenges in effectively canceling crosstalk between speakers due to difficulties in filter design, limited application areas, and high computational and memory requirements, as well as gaps between listeners and obstruction plates that fail to adequately block crosstalk components.
Innovation Solution
An acoustic device with a contact member that includes a first speaker for the left ear and a second speaker for the right ear, featuring a propagation obstruction that can be adjusted to block crosstalk components using sound-absorbing or shape-fitting materials, ensuring direct contact with the listener's head or neck to efficiently obstruct crosstalk without gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal processing is used to cancel crosstalk, then crosstalk cancellation is achieved, but filter designing becomes difficult, application area is limited, and calculation amount and memory amount are expended
Solution Approach 1:
The patent replaces the complex signal processing system (electrical/electronic approach) with a physical obstruction system (mechanical approach). Instead of using filters and calculations to cancel crosstalk, a partition plate is physically installed between speakers to block sound wave propagation paths, thereby eliminating crosstalk through mechanical means.
Solution Approach 2:
The patent extracts and removes the harmful crosstalk components from the sound propagation environment by introducing a partition plate that physically separates the sound paths between left and right speakers, thereby eliminating the need for complex signal processing to remove these unwanted components.
2Reliability
If a partition plate is installed at the ceiling surface between speakers, then crosstalk prevention is attempted, but gaps between listener and partition plate make it difficult to appropriately block propagation path of crosstalk components
Solution Approach 1:
The patent transitions from a two-dimensional ceiling-mounted partition plate to a three-dimensional headrest-integrated partition structure. By incorporating the partition plate into the headrest that directly contacts the listener's head, the system eliminates gaps in the blocking path and provides complete crosstalk isolation from the listener's position.
3Reliability
If propagation obstruction is installed to block crosstalk components, then crosstalk influence is reduced, but complex signal processing is required
Solution Approach 1:
The patent replaces complex signal processing systems with a simple mechanical partition plate structure integrated into the headrest. The physical obstruction of sound waves by the partition plate eliminates the need for sophisticated electronic filtering and signal manipulation while achieving effective crosstalk reduction.
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
The solution effectively reduces crosstalk influence by blocking the propagation path of crosstalk components, providing improved stereophonic reproduction by eliminating the need for complex signal processing and allowing for easy maintenance of the obstruction.
Implementation Method 1
the propagation obstruction may include a sound-absorbing material. In this case, since the crosstalk components output from the first speaker and the second speaker are absorbed by the propagation obstruction, the crosstalk components can be efficiently obstructed.
Data Source
AI summary
The present invention is directed to reducing influence of crosstalk components by appropriately blocking a propagation path of the crosstalk components output from speakers that reproduce signals for right and left ears respectively.Provided is a contact member used in contact with a back and/or a back of a head of a listener. The contact member is installed with: a first speaker that reproduces a signal for the left ear and a second speaker that reproduces a signal for the right ear; and a propagation obstruction adapted to block a propagation path of crosstalk components output from the respective speakers.