Outdoor Speaker Assembly Vertical Segmentation Wave Cancellation
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Solution Overview
Problem
Conventional outdoor speaker systems experience out-of-phase crossover frequency wave cancellation when speakers are spaced apart, leading to unwanted wave cancellation or muting effects in the listening area.
Innovation Solution
An outdoor speaker assembly design featuring a speaker housing with a lower section for a low-range speaker positioned below ground and an upper section for a higher-range speaker, connected via a dual-function connector-port that projects low frequencies upwards and minimizes port noise, reducing out-of-phase crossover frequency wave cancellation by spacing speakers effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If speakers are spaced apart in conventional outdoor speaker systems, then coverage area is improved, but out-of-phase crossover frequency wave cancellation occurs causing unwanted muting effects
Solution Approach 1:
The speaker system segments the frequency ranges by assigning low-range speakers and mid-to-high-range speakers to different vertical positions. Low-range speakers are positioned below ground level while mid-to-high-range speakers are positioned above ground level, creating spatial separation that prevents phase cancellation at crossover frequencies while maintaining wide coverage area
Solution Approach 2:
The invention transitions from horizontal speaker spacing to vertical speaker positioning. By placing low-range speakers below ground and mid-to-high-range speakers above ground, the system uses the vertical dimension to separate frequency ranges, eliminating the wave cancellation problem that occurs with horizontal spacing while preserving coverage area
2Shape
If low-range speaker is positioned below ground, then aesthetic appearance and space utilization are improved, but installation complexity increases
Solution Approach 1:
The system combines low-range and mid-to-high-range speakers into integrated speaker assemblies that can be installed together. The connector-port design allows the upper and lower sections to be connected as a unified unit, simplifying the burial and installation process while achieving the aesthetic benefit of below-ground low-range speakers
Solution Approach 2:
The connector-port serves as an intermediary element that facilitates the connection between above-ground and below-ground components. It provides a standardized interface that simplifies installation by allowing pre-assembled units to be connected together, reducing overall installation complexity
3Object-generated harmful factors
If connector-port diameter is increased, then port noise is minimized, but low frequency sound projection efficiency decreases
Solution Approach 1:
The invention addresses the port noise vs. efficiency contradiction by transitioning from horizontal port orientation to vertical port orientation. The vertically-extending connector-port projects low frequency sounds upward through the ground, maintaining acoustic efficiency while the increased diameter minimizes port noise
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 eliminates out-of-phase crossover frequency wave cancellation, allowing for a full sound experience with low frequencies projected from below the ground, giving the impression of a small device producing a robust sound while optimizing soundwave distribution across the listening area.
Implementation Method 1
low frequency soundwaves generated in the lower chamber are projected upward through the connector-port
Implementation Method 2
low frequency soundwaves generated in the lower chamber are projected upward through the connector-port
Implementation Method 3
reduces or eliminates out-of-phase crossover frequency wave cancellation effects
Data Source
AI summary
A speaker assembly broadly comprising a housing, an input circuit, and a number of speakers. The housing includes a lower section configured to be positioned at least partially below a ground surface and an upper section extending upwards from the lower section. The input circuit receives audio signals from a sound system or other controller and actively or passively sends the audio signals to the speakers. The speakers include a low-range speaker positioned in the lower section of the housing and a relatively higher-range speaker positioned in the upper section. The speaker assembly is configured to be spaced from other speaker assemblies within a listening area with each speaker assembly generating low frequency soundwaves and relatively higher-frequency soundwaves. This reduces or eliminates out-of-phase crossover frequency wave cancellation effects within the listening area.