Curved Diaphragm Speaker Structure for Wider Frequency Bands
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Solution Overview
Problem
Existing curved diaphragm speakers face challenges in expanding the reproduction frequency bandwidth, particularly in low frequencies, and improving sound quality, while maintaining a compact size and reducing manufacturing costs.
Innovation Solution
A speaker unit incorporating a first diaphragm in the form of a cone and a second diaphragm with multiple regions of different resonance characteristics, such as varying curvatures, thicknesses, or hardnesses, to reproduce sounds of multiple bandwidths without increasing size or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple speaker units with different sound emission directions are used to expand reproduction frequency bandwidth, then low frequency reproduction capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple diaphragms (first diaphragm and second diaphragm with different resonance characteristics) into a single speaker unit, allowing one unit to reproduce multiple frequency bands including low frequencies that previously required separate speaker units
Solution Approach 2:
The second diaphragm is designed with multiple regions of different resonance characteristics, enabling a single diaphragm to function across multiple frequency ranges, making the speaker unit universal for both low frequency and high frequency reproduction
2Reliability
If the area of the curved diaphragm is expanded to improve low frequency reproduction, then low frequency capability is enhanced, but the diaphragm dimensions become non-applicable and device size increases
Solution Approach 1:
The second diaphragm incorporates multiple regions with different local properties (different resonance characteristics) within its structure, allowing it to achieve low frequency reproduction capability without requiring uniform expansion of the entire diaphragm area
Solution Approach 2:
The second diaphragm is constructed as a composite structure with multiple regions having different resonance characteristics, enabling diverse frequency reproduction capabilities within a compact, applicable dimension
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 speaker unit achieves an expanded reproduction frequency bandwidth and improved sound quality by combining different resonance characteristics in a single diaphragm, effectively addressing the limitations of conventional curved diaphragm speakers.
Implementation Method 1
a driver unit that drives the first diaphragm and the second diaphragm together
Implementation Method 2
generates sound
Implementation Method 3
the second diaphragm includes multiple regions of different resonance characteristics
Data Source
AI summary
[Problem]Provided is a high-performance and high-quality curved diaphragm speaker system that is capable of reproducing sounds in a plurality of bands and achieves performance sufficient for hard-of-hearing people and hearing people.[Solution]A speaker unit 10 of the present invention includes a first diaphragm 1 in a corn form, a second diaphragm 2 in a curved sheet form, and a driver unit 4 that drives both of the first diaphragm and the second diaphragm. A small diameter side 1a of the first diaphragm and one end side 2a of the second diaphragm are both connected to the driver unit. The second diaphragm has a plurality of regions having different resonance characteristics due to a change in the curvature of a diaphragm surface in the middle from the one end side to the other end side in a length direction. This speaker unit is attached to a housing 50 to form a speaker 100.