Multi-Diaphragm Acoustic Device for Sound Quality
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Solution Overview
Problem
Existing acoustic devices, including earphones, do not effectively adjust loudness and improve sound quality by utilizing multiple diaphragms within the device.
Innovation Solution
An acoustic device with multiple diaphragms is designed, where the housing is divided into multiple spaces, with diaphragms forming the boundaries of these spaces to optimize sound quality and prevent low-band sound pressure loss, by adjusting the sizes and locations of the diaphragms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single diaphragm is used in the acoustic device, then the device structure is simple, but the sound quality and loudness adjustment capability are insufficient
Solution Approach 1:
The acoustic device is divided into multiple spaces (first space and second space) with each space having its own diaphragm (first diaphragm and second diaphragm). This segmentation allows independent control of sound waves in different frequency ranges, improving overall sound quality while maintaining manageable structural complexity
Solution Approach 2:
The patent transitions from a single-diaphragm configuration to a multi-diaphragm spatial arrangement, adding dimensional complexity to the acoustic chamber design. Multiple diaphragms are positioned at different locations and orientations within the housing, creating a three-dimensional acoustic field that enhances sound quality
2Manufacturing precision
If multiple diaphragms are arranged inside the acoustic device, then sound quality and loudness adjustment are improved, but the device structure becomes more complex
Solution Approach 1:
Multiple diaphragms (first diaphragm and second diaphragm) are combined within a single housing structure, with each diaphragm serving specific acoustic functions. The first diaphragm handles certain frequency ranges while the second diaphragm handles others, merging their effects to achieve superior sound quality without requiring separate devices
Solution Approach 2:
Each diaphragm in the multi-diaphragm system serves multiple functions: sound reproduction, acoustic pressure regulation, and frequency range specialization. The first diaphragm and second diaphragm work together to provide both bass and treble response, making the system universally capable of handling various audio frequencies
3Manufacturing precision
If diaphragms are placed at space boundaries to prevent low-band sound pressure loss, then acoustic performance is improved, but the housing design becomes more constrained
Solution Approach 1:
Diaphragms are strategically positioned at specific locations within the housing (first diaphragm at one location, second diaphragm at another location) to address local acoustic requirements. Each diaphragm is placed where it can most effectively prevent sound pressure loss in its specific region, optimizing acoustic performance without requiring complete redesign of the entire housing structure
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 effectively secures optimum sound quality and prevents low-band sound pressure loss by utilizing multiple diaphragms to adjust the acoustic device's sound output, applicable to various acoustic devices such as earphones and speakers.
Implementation Method 1
a driver disposed inside the housing, and including a main diaphragm; and an additional diaphragm disposed at a boundary of a space formed by the housing
Implementation Method 2
effectively secures optimum sound quality and prevents low-band sound pressure loss
Data Source
AI summary
The inside of the housing of an acoustic device, such as an earphone, is divided into two or more spaces based on a driver. Diaphragms are disposed to cover a nozzle communicating with an ear of a user and a vent hole formed in the back of the housing. Optimum sound quality can be secured by adjusting the sizes of the spaces formed by the diaphragms and the housing and the locations where the diaphragms are disposed. When the housing is of a sealed type, low-band sound pressure can be effectively prevented from being lost.