Speaker Headrest Cushion Structure for Sound Isolation and Clarity
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Solution Overview
Problem
Existing headrest designs with integrated speakers lack a structure to enhance sound quality, relying solely on through holes for sound output without consideration for acoustic transparency or soundproofing, leading to suboptimal sound effects.
Innovation Solution
A headrest design featuring a net member with acoustically transparent parts and soundproof parts made of materials like polyurethane foam, integrated into the headrest cushion member to support the speakers and reduce sound interference, using a three-dimensional knitted fabric for enhanced acoustic transparency and mechanical absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If through holes are provided for sound output, then sound can be output to the outside, but sound interference occurs between speakers and acoustic transparency is insufficient
Solution Approach 1:
The net member is designed with different local properties: acoustically transparent parts at positions corresponding to speaker units to allow sound passage, and soundproof parts at other positions to prevent sound interference. This local differentiation resolves the contradiction by allowing sound output where needed while blocking interference paths.
Solution Approach 2:
The net member combines materials with different acoustic properties - acoustically transparent materials (open mesh structure) and soundproof materials (denser, sound-absorbing material) - into a single integrated component. This composite structure enables simultaneous sound transmission and interference reduction.
2Adaptability or versatility
If speakers are installed inside the headrest, then the headrest can provide audio function, but sound quality is degraded due to lack of soundproofing structure
Solution Approach 1:
The net member provides localized soundproofing at positions between speakers while maintaining acoustic transparency at speaker output positions. This selective soundproofing enables the headrest to provide audio functionality while preventing sound quality degradation from interference.
3Reliability
If net members are provided to prevent head from sinking, then head support safety is improved, but sound passage is blocked
Solution Approach 1:
The net member is designed with acoustically transparent parts that allow sound passage while maintaining the head support function. The transparent mesh structure provides both mechanical support and acoustic permeability, resolving the contradiction between safety and sound passage.
4Object-generated harmful factors
If soundproof parts are added to reduce interference, then sound quality is improved, but device complexity increases
Solution Approach 1:
The soundproof parts and acoustically transparent parts are integrated into a single net member component rather than being separate assemblies. This merging reduces device complexity while still achieving sound interference reduction through the differentiated structure.
Solution Approach 2:
The net member serves multiple functions simultaneously: head support, sound output, and sound interference reduction. By combining these functions into one component with differentiated regions, the design avoids additional complexity from separate components.
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 design improves sound quality by allowing acoustic energy to pass through while reducing sound interference between speakers, providing a more effective sound field and supporting the head with enhanced cushioning and mechanical absorption.
Implementation Method 1
acoustically transparent parts at places substantially facing the respective speaker units
Implementation Method 2
soundproof parts disposed between the pair of left and right acoustically transparent parts in the net member and between the pair of left and right enclosures respectively
Implementation Method 3
The soundproof parts can be each formed by using at least one of a sound insulating material and a sound absorbing material
Implementation Method 4
a three-dimensional knitted fabric for enhanced acoustic transparency and mechanical absorption
Data Source
AI summary
There is provided a headrest with speakers capable of exhibiting an excellent sound effect. The headrest with speakers includes: a headrest frame; a pair of left and right enclosures supported by the headrest frame; speaker units supported in the enclosures respectively; and a headrest cushion member supported by the headrest frame to support a head, the headrest cushion member including: a net member having a pair of left and right acoustically transparent parts at places substantially facing the respective speaker units; and soundproof parts disposed between the pair of left and right acoustically transparent parts in the net member and between the pair of left and right enclosures respectively.