Segmented Helmholtz Resonators on Curved Surfaces

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Solution Overview

Problem

Existing sound absorption structures using Helmholtz resonance face challenges when installed on curved surfaces, as rigid planar members cannot conform to the curvature, and pliable members struggle to maintain uniform distance from the wall, leading to blocked openings and reduced sound absorption efficiency.

Innovation Solution

A sound absorption structure comprising separate resonators that produce Helmholtz resonance and a pliable coupling member, which can deform to fit curved surfaces, ensuring effective sound absorption by maintaining air layers and optimizing resonator placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a rigid planar member is used for sound absorption, then the structure maintains stable geometry and uniform air layer distance, but it cannot conform to curved wall surfaces

Engineering Contradiction:

Improvestructural stabilityVSAvoidadaptability to curved surfaces

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The planar member is divided into multiple independent resonators that are coupled together. Each resonator can independently adjust to the curved surface while maintaining its structural integrity, allowing the overall structure to conform to curved wall surfaces while preserving stability through the coupling mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coupling member connecting the resonators is designed to be flexible, enabling the entire structure to adapt to curved surfaces. This flexibility allows the resonators to follow the contour of curved walls while maintaining their functional geometry for sound absorption.

Inventive Principle:

Principle #30Flexible shells and thin films

2Adaptability or versatility

If a pliable member is used for sound absorption, then the structure can conform to curved wall surfaces, but it becomes difficult to maintain uniform distance from the wall body

Engineering Contradiction:

Improveadaptability to curved surfacesVSAvoiduniformity of air layer distance

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

By segmenting the structure into discrete resonators connected by flexible coupling members, each resonator can be positioned to maintain the required air layer distance while the coupling members adapt to surface curvature. This segmentation allows independent positioning control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The flexible coupling members provide dynamic adjustment capability, allowing the resonators to maintain optimal positioning relative to the wall surface while adapting to curvature variations. The flexibility enables continuous adjustment to maintain uniform air layer distance across curved surfaces.

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If extension members are in contact with the wall body, then installation on curved surfaces becomes easier, but the openings are blocked and sound absorption effect is lost

Engineering Contradiction:

Improveease of installationVSAvoidsound absorption effectiveness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The structure is segmented into resonators with openings that face away from the wall surface. The flexible coupling members connect these resonators without blocking their openings, ensuring that sound absorption functionality is maintained while allowing installation on curved surfaces.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The flexible coupling members act as intermediaries between the resonators and the curved wall surface, providing mechanical support and positioning without interfering with the sound absorption function. They transmit structural forces while allowing the resonator openings to remain unobstructed.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 structure achieves desired sound absorption even on curved surfaces by allowing the pliable coupling member to conform to the wall, ensuring consistent air layer separation and enhanced sound absorption efficiency across a wider frequency band.

Implementation Method 1

a sound absorption structure includes a plurality of resonators that constitute separate bodies from each other and that produce Helmholtz resonance

Methodology Applied

Scientific EffectHelmholtz resonance: Helmholtz Resonance

Data Source

PatentUS11521589B2Sound absorption structure

Publication Date: 2022.12.06 YAMAHA CORP

AI summary

A sound absorption structure includes resonators that constitute separate bodies from each other and that produce Helmholtz resonance and a pliable coupling member that couples the plurality of resonators. Each of the resonators has a tubular shape or a pipe shape, includes an opening portion provided on a first end face, and includes a bottom portion provided on a second end face that is an opposite end face to the first end face. Each of the resonators is pliable.