Multi-diaphragm Speaker System with Sealed Acoustic Cavities
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Solution Overview
Problem
Conventional speaker systems experience air leakage due to connecting rods penetrating through diaphragms, leading to intermodulation, harmonic distortion, and turbulent noise, resulting in poor sound quality, and the challenge of maintaining airtightness between front and rear cavities.
Innovation Solution
A multi-diaphragm speaker system with inner and outer connecting rods that interconnect diaphragms without penetrating them, utilizing a front-rear cavity sealing device to separate the cavities, forming distinct acoustic cavities and ensuring sound isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connecting rods penetrate through the diaphragms to connect them, then the diaphragms can be connected together, but air leakage occurs at the opening resulting in poor sound quality
Solution Approach 1:
The harmful function of the connecting rods penetrating through the diaphragms is extracted and removed. Instead, the connecting rods are positioned to connect diaphragms without penetrating them, eliminating the source of air leakage while maintaining the structural connection function.
Solution Approach 2:
A sealing structure is introduced as an intermediary element between the connecting rods and the diaphragms. This sealing structure prevents air from passing through the connection points, thereby eliminating air leakage while allowing the connecting rods to perform their structural function.
2Ease of manufacture
If outer connecting rods are used to connect housings, then diaphragms can be interconnected, but the front and rear cavities become connected compromising airtightness
Solution Approach 1:
The speaker structure is segmented into distinct front and rear cavity sections. The outer connecting rods are positioned and configured to connect housings in such a way that they do not create a continuous passage between the front and rear cavities, maintaining acoustic isolation while enabling diaphragm interconnection.
Solution Approach 2:
The harmful connection path between front and rear cavities is extracted and removed from the system. The outer connecting rods are designed to provide structural support without forming a through-hole or communication channel between the two acoustic cavities, thereby preserving airtightness.
Data Source
AI summary
A multi-diaphragm speaker system comprises a speaker apparatus and a front/rear cavity sealing apparatus. The speaker apparatus comprises at least four diaphragms. Cavities of the speaker apparatus are formed between every two adjacent diaphragms of the speaker apparatus. The cavities that are spaced apart from each other jointly form a first acoustic cavity of the speaker apparatus. The cavities adjacent to the first acoustic cavity form a second acoustic cavity of the speaker apparatus. The first acoustic cavity and the second acoustic cavity are separated via the front/rear cavity sealing apparatus. Utilization of the present utility model solves the problem of speaker front/rear cavity separation.