Linear Diaphragm Ceiling Speaker for Uniform Bass Coverage
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Solution Overview
Problem
Existing ceiling-mounted loudspeakers, particularly those integrated into suspended ceilings, struggle to produce high-quality, low-frequency sound without disrupting the aesthetic appearance and requiring modifications to ceiling tiles, and often suffer from sound wave interference and distortion.
Innovation Solution
A loudspeaker with an elongated linear diaphragm and a frame that fits within a T-bar grid, featuring a narrow, rigid piston and a conductive voice strip, which interacts with a magnetic field to produce sound waves without geometric restrictions, minimizing interference and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional conical diaphragm loudspeakers are mounted on ceilings, then space is saved and aesthetics are improved, but sound quality especially low-frequency performance deteriorates and dead spots are created
Solution Approach 1:
The patent transitions from conventional conical diaphragms (3D radial structure) to a planar rectangular diaphragm (2D surface). This dimensional change allows the speaker to produce a cylindrical wavefront that maintains uniform sound distribution in all directions, eliminating dead spots while preserving ceiling mounting advantages. The planar geometry enables better low-frequency performance by matching the wavelength of bass frequencies.
Solution Approach 2:
The patent changes the geometric parameters of the diaphragm from conical to rectangular with specific aspect ratios. By optimizing the length-to-width ratio and overall dimensions, the speaker achieves improved bass extension and high-frequency response. The parameter changes also allow the diaphragm to produce uniform cylindrical wavefronts that eliminate directional bias and dead spots.
2Reliability
If multiple separate speakers are used to improve sound coverage, then sound distribution improves, but device complexity and space requirements increase
Solution Approach 1:
The patent merges the functions of multiple separate speakers into a single unit by using an elongated planar diaphragm that radiates sound uniformly in all directions. The rectangular geometry with optimized dimensions allows one speaker to provide the sound coverage that would traditionally require multiple smaller speakers, reducing complexity while maintaining uniform sound distribution.
Solution Approach 2:
By extending the diaphragm in one dimension while keeping the other dimension compact, the patent creates a line-source radiator that produces cylindrical wavefronts. This dimensional approach allows a single speaker to achieve omnidirectional sound distribution, eliminating the need for multiple speakers arranged in different locations.
3Reliability
If larger diaphragms are used to improve low-frequency performance, then bass quality improves, but space requirements and aesthetic appearance deteriorate
Solution Approach 1:
The patent extends the diaphragm in one dimension (length) while keeping the other dimension (width) narrow, creating an elongated rectangular geometry. This allows the speaker to achieve the surface area needed for good bass response without requiring a large footprint on the ceiling. The planar configuration provides better low-frequency performance while maintaining a compact aesthetic appearance.
Solution Approach 2:
By optimizing the aspect ratio and dimensions of the rectangular diaphragm, the patent achieves improved bass extension without increasing the overall area occupied on the ceiling. The parameter optimization allows the diaphragm to match the wavelength of bass frequencies while maintaining a narrow profile that fits aesthetically within ceiling constraints.
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 provides high-quality sound with improved low-frequency performance, maintains aesthetic integration into suspended ceilings, and eliminates sound wave interference, while requiring minimal modifications to the ceiling structure.
Implementation Method 1
By varying current through the wire (or adjusting the magnetic field) the coil of wire is caused to move perpendicular to the magnetic field. Interaction between this current and magnetic field causes these varying forces to be applied to the voice coil, moving the voice coil perpendicular to the magnetic field
Implementation Method 2
The diaphragm (also called the cone) interacts with air molecules to cause them to move in a manner (and frequencies) which creates sound waves in the air which can then be heard by individuals (or detected by other sensors) nearby
Data Source
AI summary
A frame has an elongate form with elongate rest shelves on lateral sides thereof to support ceiling tiles. Ends of the frame are connected to T-bars within a suspended ceiling, as one example of mounting system for the loudspeaker of this invention. A yoke is fixed within a channel of the frame. The yoke has a pair of arms supporting magnets on ends thereof. A gap is provided between the magnets. A voice strip is located within this gap between the magnets and has a piston thereon which includes a diaphragm. A voice coil associated with the voice strip interacts with a magnetic field created by the magnets to cause the piston to vibrate, and in turn to cause the diagram to emit sound waves. The diaphragm is elongate with a width less than 10% of its length. A surround supports a perimeter of the diaphragm relative to the frame.