Sound Pressure Control Device Using Nested Spiral and Cylindrical Paths
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Solution Overview
Problem
Conventional sound pressure reduction technologies in audio devices, such as headphones and speakers, require large structures to effectively reduce noise over a wide band, leading to increased device size, and existing acoustic metamaterials using Helmholtz resonance and coil cavities also face challenges in downsizing while maintaining sound pressure control across multiple wavelengths.
Innovation Solution
A sound pressure control device featuring a cylindrical first path and a spiral second path, where the sound travels perpendicular to the infiltration direction, with optional elasticity, multiple paths, and a shape control unit using a magnet and coil to adjust shape based on sound pressure, allowing for compact design while reducing noise across a wide frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If Helmholtz resonance or coil cavity structures are used to reduce sound pressure over a wide band, then sound pressure reduction performance is improved, but device size increases
Solution Approach 1:
The patent implements nesting by placing the second spiral path inside the first cylindrical path, creating a concentric structure where one acoustic path is nested within another. This allows multiple acoustic functions to occupy the same spatial volume, effectively reducing the overall device size while maintaining wide-band sound pressure reduction capability through the combined resonance effects of both paths.
Solution Approach 2:
The patent transitions from conventional planar or linear acoustic structures to three-dimensional spiral and cylindrical geometries. The first path is formed in a cylindrical shape and the second path in a spiral shape around it, utilizing spatial arrangement in multiple dimensions to achieve compact footprint while providing sufficient acoustic path length for effective noise reduction across wide frequency bands.
2Object-affected harmful factors
If multiple structures for different wavelengths are arranged side by side to reduce sound pressure over a wide band, then sound pressure reduction performance is improved, but device size increases
Solution Approach 1:
The patent merges the functions of multiple acoustic paths into a single integrated structure where the first cylindrical path and second spiral path are combined in one compact unit. This unified design integrates multiple wavelength control capabilities within a single component, reducing overall device complexity compared to arranging separate structures side by side, while still achieving wide-band noise reduction through the synergistic interaction of the two paths.
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 sound pressure over a wide band, enabling downsizing of audio devices while maintaining noise reduction performance, and allows for comfortable wear by accommodating gaps without compromising sealability, thus improving user experience.
Implementation Method 1
acoustic metamaterials using Helmholtz resonance and coil cavity are being used
Implementation Method 2
acoustic metamaterials using Helmholtz resonance and coil cavity are being used
Implementation Method 3
The sound pressure control unit may have elasticity
Implementation Method 4
The shape control unit may include a magnet and a coil
Data Source
AI summary
To contribute to downsizing of a device while reducing sound pressure of noise over a wide band. The present technology provides a sound pressure control device that includes a sound pressure control unit that includes a first path and a second path through which infiltrating sound passes, in which the first path is formed in a cylindrical shape in a direction differing from a direction in which the sound infiltrates, and the second path is formed in a spiral shape around an outer periphery of the first path. Furthermore, the present technology provides an electronic device and a component including the sound pressure control device.