Acoustic Horn Waveguide Lens Plug Directivity
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Solution Overview
Problem
Conventional acoustic systems experience directivity anomalies and non-uniform sound dispersion due to differing coverage angles of transducers in the crossover region, leading to varying listening experiences for individuals in the same area.
Innovation Solution
An acoustic assembly with a modular enclosure and an integrated acoustic horn that includes waveguides, lenses, and plugs to optimize directivity across frequency bands, ensuring uniform sound coverage by aligning and positioning these components to influence sound waves from various transducers, thereby achieving consistent sound distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transducers with different coverage angles are used in the crossover region, then frequency coverage is improved, but directivity uniformity deteriorates
Solution Approach 1:
An acoustic horn is introduced as an intermediary component between the transducers and the listening area. The acoustic horn has a specific geometry designed to transform the sound waves from transducers with different coverage angles into a unified directional pattern, thereby mediating between the conflicting requirements of frequency coverage and directivity uniformity
Solution Approach 2:
The acoustic horn is designed with varying cross-sectional dimensions along its length, creating different local acoustic properties. The geometry is optimized to provide appropriate impedance matching and wavefront transformation at different positions, enabling uniform directivity across the crossover region while maintaining broad frequency coverage
2Adaptability or versatility
If transducers with different coverage angles are used, then frequency range coverage is improved, but sound dispersion uniformity deteriorates
Solution Approach 1:
The acoustic horn serves as a mediator that receives sound waves from multiple transducers with different coverage angles and transforms them into a unified dispersion pattern. This intermediary structure enables the system to maintain both broad frequency range coverage and uniform sound dispersion across the listening area
Solution Approach 2:
The acoustic horn geometry is specifically designed with varying cross-sectional dimensions that change along the length of the horn. These parameter variations are optimized to control wave propagation and achieve uniform sound dispersion while accommodating transducers with different coverage angles across the frequency range
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 assembly provides a uniform sound coverage pattern across the listening area, enhancing the listening experience by minimizing differences in sound perception at various locations, and improving directivity and beamwidths within the audible hearing range.
Implementation Method 1
an acoustic horn that includes waveguides, lenses, and plugs to optimize directivity across frequency bands, ensuring uniform sound coverage by aligning and positioning these components to influence sound waves from various transducers
Data Source
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AI summary
An acoustic assembly may include acoustic emitting devices attached to an enclosure. The acoustic assembly may further include an acoustic horn for influencing sound emitted by one or more of the acoustic emitting devices. For example, the acoustic horn may influence a beamwidth of sound emitted by one of the acoustic emitting devices. As a further example, the acoustic horn may influence a first beamwidth of a first acoustic emitting device and a second beamwidth of a second acoustic emitting device in a crossover region between the first acoustic emitting device and the second acoustic emitting device. The acoustic horn may include a waveguide attached to at least one integrator. The at least one integrator may include at least one plug and at least one lens.