Multifaced Diaphragm Assembly for Omnidirectional Sound
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Solution Overview
Problem
Existing omnidirectional speaker systems with a multifaced diaphragm assembly suffer from peaks and dips in frequency response due to rigid portions between speaker units, failing to emulate a true point-source sound and requiring costly compensatory filtering.
Innovation Solution
A multifaced diaphragm assembly with polygonal segments forming a nearly spherical shell, where speaker drive units are arranged to oppose each diaphragm segment, utilizing a bobbin, voice coil, yoke, and magnet, and combined through concave-convex fitting, eliminating the need for additional supporting members and enhancing air flow for improved acoustic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If speaker units are arranged on a polyhedral enclosure with rigid portions between them, then structural stability is improved, but frequency response quality deteriorates due to peaks and dips
Solution Approach 1:
The diaphragm is divided into multiple polygonal diaphragm segments that are combined to form a spherical shell, with each segment corresponding to a speaker drive unit. This segmentation allows independent vibration of each segment, eliminating the rigid portions between speaker units that cause frequency response peaks and dips.
Solution Approach 2:
The diaphragm segments are combined to form a spherical shell shape, creating a pulsating sphere configuration. This spherical geometry enables omnidirectional sound radiation and ensures that all segments vibrate in unison, producing point-source sound characteristics while eliminating standing waves and frequency response anomalies.
2Manufacturing precision
If compensatory filtering is applied through DSP to reduce peaks and dips, then frequency response quality is improved, but device complexity and cost increase
Solution Approach 1:
The spherical diaphragm configuration itself inherently produces uniform frequency response across all directions without requiring external compensatory filtering. The geometry and vibration pattern of the pulsating sphere automatically eliminate the peaks and dips that would otherwise require DSP intervention, thereby reducing device complexity and cost.
3Manufacturing precision
If a multifaced diaphragm assembly with polygonal segments is used, then omnidirectional point-source sound is achieved, but manufacturing complexity increases
Solution Approach 1:
The diaphragm is segmented into multiple polygonal sections that can be manufactured separately and then combined to form the complete spherical shell. This segmentation simplifies the manufacturing process by allowing each segment to be produced using standard techniques, then assembled together to achieve the complex omnidirectional geometry.
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 an omnidirectional point-source sound similar to a pulsating sphere, reduces dips in frequency response, and lowers production costs by eliminating the need for separate supporting members, while improving acoustic performance, especially in the lower-pitched range.
Implementation Method 1
a magnet that generates a drive force in the voice coil along with the yoke
Data Source
AI summary
One mode of the present invention provides an electroacoustic transducer composed of a multifaced diaphragm assembly and a multifaced speaker housing assembly that is housed inside the multifaced diaphragm assembly. The multifaced speaker housing is configured by combining the outer peripheral surface of a plurality of individual speaker drive units into a nearly spherical shell. The multifaced diaphragm assembly, which has thereinside the multifaced speaker housing assembly, is configured to have a plurality of regular pentagonal diaphragm segments that are combined together into a nearly spherical shape shell, and a plurality of speaker drive units opposing the diaphragm segments from inside in one-to-one relation. Each speaker drive unit has a bobbin, the one end portion of which is adhered to the center portion of the inner surface of each diaphragm segment.