Curved Segmented Acoustic Panel for Echo Diffusion
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Solution Overview
Problem
Existing acoustic devices fail to uniformly absorb sound frequencies, leading to distorted sound and ineffective echo cancellation, especially in smaller rooms where devices are not fully effective due to their size and limited coverage.
Innovation Solution
An acoustic panel with a curved front surface divided into regions that diffuse sound waves in multiple directions, reducing parasitic echoes by breaking up sound waves into sections and creating phase shifts, ensuring effective echo cancellation even at close distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If absorption type devices are used to reduce echoes, then sound absorption is improved, but spectral characteristics are distorted due to preferential absorption at higher frequencies
Solution Approach 1:
The panel front surface is divided into multiple discrete curved regions, each acting as an independent scattering center. This segmentation allows the panel to diffuse sound waves across a broader frequency range more uniformly, avoiding the preferential absorption at higher frequencies that occurs with traditional absorption devices.
Solution Approach 2:
Each front surface region has a curved geometry that scatters incoming sound waves in multiple directions. The curvature causes phase shifts and diffraction effects that distribute sound energy more evenly across frequencies, preventing the spectral distortion associated with flat absorption surfaces.
2Loss of information
If diffusion type devices are used to distribute sound energy, then echo cancellation is improved, but device size must be relatively large to be effective
Solution Approach 1:
By dividing the panel surface into multiple smaller curved regions, the patent achieves effective sound diffusion in a more compact form factor. Each curved region acts as a scattering element, and their collective arrangement provides comprehensive echo cancellation without requiring a single large diffusion surface.
Solution Approach 2:
The patent utilizes the third dimension by creating curved surfaces that protrude from the panel front surface. This dimensional approach allows sound waves to be scattered in multiple directions through phase shifts and diffraction, achieving effective diffusion in a smaller overall device footprint.
3Loss of information
If diffusion type devices are used to cancel echoes, then sound distribution is improved, but effectiveness is limited to distances of many feet from the device
Solution Approach 1:
The curved geometry of each front surface region creates diffraction effects and phase shifts that scatter sound waves more effectively at closer distances. The curvature causes sound waves to bend and spread in multiple directions, extending the effective diffusion range to include listeners positioned within one foot of the device.
Solution Approach 2:
The curved surfaces interact with sound waves to create complex wave patterns including phase shifts and interference effects. These acoustic interactions enhance sound diffusion at close proximity, allowing listeners near the device to benefit from the echo cancellation capabilities.
4Loss of energy
If absorption type devices are used to reduce echoes, then sound absorption is improved, but the room sounds dead due to preferential absorption at higher frequencies
Solution Approach 1:
The segmented curved regions on the panel surface diffuse sound waves across a broad frequency range rather than preferentially absorbing higher frequencies. This maintains a more natural sound quality while still reducing parasitic echoes, preventing the dead room effect.
Solution Approach 2:
The curved surfaces scatter sound waves through diffraction and phase shifts, distributing sound energy more evenly across frequencies. This preserves the spectral characteristics and natural sound quality while achieving effective echo reduction.
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 acoustic panel effectively diffuses sound waves across the room, reducing reverberation time and improving sound quality by ensuring that sound waves are spread in many directions, rather than partially reflected, thus enhancing listening experience without distorting spectral characteristics.
Implementation Method 1
The sound waves incoming at the panel front surface are diffused by the panel front surface
Implementation Method 2
reducing parasitic echoes by breaking up sound waves into sections and creating phase shifts
Data Source
AI summary
An acoustic panel for diffusing sound waves, the acoustic panel comprising: a panel front surface and a substantially opposed panel back surface; the panel front surface defining a plurality of front surface regions each delimited by a respective front surface region perimeter, each of the front surface regions being curved. The sound waves incoming at the panel front surface are diffused by the panel front surface.