Speaker Integration via Elastomeric Gasket for Rub and Buzz Prevention
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Solution Overview
Problem
The integration of speakers in electronic devices often results in 'rub and buzz' acoustic distortion due to tightly packed mechanical components and relies heavily on adhesives, which compromise yield, repeatability, and serviceability.
Innovation Solution
A speaker-integration system using an elastomeric gasket to mount the speaker to an intermediate structure, forming a sealed cavity that acts as the speaker's back volume, with a detachable grommet for wire management to prevent contact with surrounding parts, allowing for re-workable, serviceable, and cost-effective integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If additional mechanical and electromechanical components are tightly packed around the speaker to integrate it into the electronic device, then the speaker integration is achieved, but acoustic distortion (rub and buzz) occurs degrading sound quality
Solution Approach 1:
An elastomeric gasket is introduced as an intermediary component between the speaker and the housing structure. The gasket serves as a mediator that provides both mechanical support for integration and acoustic isolation to prevent rub and buzz, resolving the contradiction between achieving speaker integration and preventing acoustic distortion.
Solution Approach 2:
The elastomeric gasket is a flexible component that conforms to the speaker and housing surfaces, providing both structural support for integration and compliant isolation to prevent acoustic distortion. The flexibility of the elastomeric material allows it to absorb vibrations and prevent direct contact between rigid components.
2Strength
If adhesive is used as the primary method of speaker integration to the product, then the speaker is securely mounted, but the yield, repeatability, and serviceability of the product are significantly lowered
Solution Approach 1:
The mounting system is segmented into discrete mechanical components (gasket, housing features, mounting structure) rather than relying on a continuous adhesive bond. This segmentation allows the speaker to be securely mounted through mechanical means while enabling easy removal and reassembly for serviceability.
Solution Approach 2:
The adhesive bonding system is replaced with a mechanical mounting system using the elastomeric gasket and housing features. This substitution maintains secure mounting strength while dramatically improving serviceability, as mechanical components can be easily disassembled and reassembled compared to adhesive bonds.
3Strength
If adhesive is used as the primary method of speaker integration, then the speaker is securely mounted, but the yield and repeatability of the product are significantly lowered
Solution Approach 1:
The mounting system is divided into standardized, interchangeable components that can be consistently manufactured and assembled. The elastomeric gasket and housing features provide repeatable mechanical engagement without the variability inherent in adhesive application processes, improving both yield and repeatability.
Solution Approach 2:
The mounting method transitions from chemical bonding (adhesive) to mechanical bonding (gasket and housing features). This parameter change eliminates variables associated with adhesive application (surface preparation, curing time, bond strength variability) and provides consistent, repeatable mounting results that improve productivity.
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 system effectively prevents acoustic distortion by sealing the speaker within the device, reducing the need for adhesives and fasteners, and enhances serviceability while maintaining low production costs.
Implementation Method 1
an elastomeric gasket to mount the speaker to an intermediate structure
Implementation Method 2
The intermediate structure may also be used for heat dissipation
Data Source
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AI summary
This document describes a speaker-integration system and associated devices and systems. The speaker-integration system includes a speaker that is re-workably mounted, via an elastomeric gasket, to an intermediate structure that is mountable to an outer enclosure of an electronic device. The intermediate structure forms a cavity in which the speaker is sealed, effective to use the cavity as the speaker's back volume to contain acoustic waves without impacting other structures in the electronic device. The front of the speaker is sealed against the outer enclosure by a gasket that controls, based on its placement and geometry, axial and radial directions of the speaker relative to the intermediate structure to prevent the speaker from buzzing against surrounding rigid parts. The speaker has wires that exit the back volume via a detachable grommet, which controls positioning of the wires to prevent rub and buzz against surrounding parts.