Earmuff Airbag Nested Structure for Noise Reduction
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Solution Overview
Problem
Conventional head-mounted headphones have a poor passive noise reduction ability due to noise only passing through two conducting media, earmuff leather and sponge, which is insufficient for effective noise reduction.
Innovation Solution
The addition of a hollow enclosed earmuff airbag made of soft rubber material, which increases the number of noise conducting media and provides enhanced support, is integrated into the earmuff design, along with an airbag base to improve support and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional earmuff structure with only earmuff leather and sponge is used, then the structure is simple, but the passive noise reduction ability is poor
Solution Approach 1:
The patent implements a multi-layer nested structure where the earmuff airbag is placed inside the earmuff assembly, which is then wrapped by earmuff sponge and finally covered by earmuff leather. This nested arrangement allows noise to pass through multiple conducting media (leather, sponge, airbag) in sequence, enhancing passive noise reduction without requiring a completely separate external structure.
Solution Approach 2:
The earmuff assembly is segmented into distinct functional layers: earmuff leather (outer layer), earmuff sponge (middle layer), and earmuff airbag (inner layer). Each segment serves a specific purpose in the noise reduction process, allowing noise to be progressively attenuated as it passes through each segment. This segmentation enables improved noise reduction performance while maintaining structural organization.
2Force
If earmuff sponge is used for support, then the structure is simple, but the support force is insufficient
Solution Approach 1:
The patent creates a composite support structure combining earmuff sponge (soft, conforming material) with earmuff airbag (hollow, rigid structure). The airbag base is specifically designed to be disposed at the bottom of the airbag to enhance support force. This composite approach leverages the complementary properties of different materials to achieve superior support performance compared to using sponge alone.
Solution Approach 2:
The patent utilizes the pneumatic properties of trapped air within the hollow enclosed airbag structure to provide enhanced support force. The airbag can be inflated to adjust the support characteristics, allowing the user to customize the firmness and adaptability of the earmuff. This pneumatic element adds a new dimension of adjustability and support capability beyond what solid sponge materials can provide.
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 enhances the passive noise reduction ability and user experience by allowing noise to be continuously reduced through multiple media, while also providing stronger support than conventional sponge materials.
Implementation Method 1
The addition of a hollow enclosed earmuff airbag made of soft rubber material, which increases the number of noise conducting media and provides enhanced support, is integrated into the earmuff design
Data Source
AI summary
An earmuff and head-mounted headphones are disclosed. The earmuff comprises earmuff leather and earmuff sponge. The earmuff further comprises an airbag base and an earmuff airbag made of a soft rubber material. The earmuff airbag comprises at least one hollow enclosed airbag. The airbag base is disposed at a bottom of the earmuff airbag to enhance a support force of the bottom of the earmuff airbag. The earmuff sponge is wrapped on an outer surface of the earmuff airbag. The earmuff leather is wrapped on an outer surface of the earmuff sponge. The earmuff according to the present disclosure increases the conducting media of noise by adding the earmuff airbag. The noise will be continuously reduced after passing through different media, thereby enhancing the passive noise reduction ability of the earmuff, and improving the user experience.