Speaker Module Dual Passive Radiators Compact Bass
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Solution Overview
Problem
Speaker modules with reduced volume face challenges in achieving ideal bass effects due to limited space, as existing designs struggle to effectively utilize internal space for enhanced acoustical performance.
Innovation Solution
The speaker module incorporates two passive radiators in parallel, with a passive sound source in the rear acoustic cavity, utilizing acoustic guide channels and strategically positioned sound holes to radiate sound waves, enhancing bass effect and overall acoustical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the volume of the speaker module is reduced, then the size of the terminal electronic device is reduced, but the bass effect deteriorates
Solution Approach 1:
The passive sound source is divided into two separate passive radiators instead of using a single passive radiator. This segmentation allows for better distribution of acoustic energy and improved bass response within the limited volume of the speaker module, resolving the contradiction between compact size and bass effect quality.
Solution Approach 2:
The two passive radiators are arranged in parallel within the rear acoustic cavity, nesting multiple acoustic elements within the constrained space. This nested arrangement maximizes the utilization of available volume while maintaining effective bass radiation, addressing both the volume reduction requirement and bass effect preservation.
2Reliability
If the volume of the rear acoustic cavity is increased, then the bass effect is improved, but the space available in the speaker module is reduced
Solution Approach 1:
The two passive radiators are arranged in parallel (side-by-side) rather than stacking them vertically or using a single large radiator. This dimensional arrangement optimizes space utilization within the rear acoustic cavity, achieving effective bass response without excessively increasing the cavity volume or compromising overall speaker module compactness.
3Reliability
If two passive radiators are added in parallel, then the bass effect is enhanced, but the device complexity increases
Solution Approach 1:
The two passive radiators are integrated into a unified parallel arrangement within the rear acoustic cavity, sharing common mounting structures and acoustic pathways. This merging approach reduces the overall structural complexity compared to implementing two separate acoustic systems, while still achieving enhanced bass effect through the dual-radiator configuration.
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
This configuration effectively improves bass effect and acoustical performance by fully utilizing internal space, allowing for better sound wave transmission and radiation, even in compact speaker module designs.
Implementation Method 1
the passive sound source comprises two passive radiators, and the sound wave at one side of the vibrating diaphragm of the active sound source closer to the rear acoustic cavity is output to positions where the two passive radiators are located respectively, so as to vibrate the two passive radiators, and the air flow between the two passive radiators is pressed, so as to form low frequency sound wave
Data Source
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AI summary
Disclosed is a speaker module, comprising an active sound source, a passive sound source and a protective frame; the active sound source comprises a vibration system and a magnetic circuit system; the side surface of the protective frame is provided with a sound hole for the active sound source; the passive sound source comprises two passive radiators, and the two passive radiators are arranged in parallel and enclose a cavity; a sound wave at one side of a vibrating diaphragm adjacent to the magnetic circuit system is divided into two parts respectively transmitted to one side of each of the two passive radiators away from the cavity; and a sound wave in the cavity is projected and emitted to the external environment via a sound hole for the passive sound source. The structure improves the bass effect of the speaker module, and improves the acoustic performance of the product.