Speaker Breathable Spacer Sound Absorbing Cavity Design
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Solution Overview
Problem
Existing portable speaker designs face limitations in sound quality due to restricted internal cavity capacity and detachment issues with sound absorbing materials, which hinder effective acoustic performance.
Innovation Solution
The speaker design incorporates a breathable spacer fixed to the lower housing, creating an enlarged sound absorbing cavity system by combining the first sound absorbing cavity defined by the breathable spacer and the second sound absorbing cavity within the upper housing, with a communication port allowing for increased filling space and improved acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the internal cavity is filled with sound absorbing material encapsulated by breathable gauze, then acoustic effect is improved, but the cavity capacity is limited by cover plate material and thickness
Solution Approach 1:
The sound absorbing cavity is divided into two separate cavities: a first sound absorbing cavity and a second sound absorbing cavity. These two cavities are connected through a communication port, allowing sound waves to interact with sound absorbing material in both cavities. This segmentation enables increased total sound absorbing material capacity while maintaining acoustic performance.
2Reliability
If breathable gauze is used to encapsulate sound absorbing material, then acoustic performance is improved, but components are easily detached from housing
Solution Approach 1:
The breathable gauze encapsulation is removed entirely from the design. Instead, sound absorbing material is directly placed in the first sound absorbing cavity without any encapsulating material. This eliminates the detachment problem of breathable gauze while maintaining acoustic performance through the cavity structure itself.
Solution Approach 2:
A buffer member is introduced as an intermediary component between the speaker unit and the housing. This buffer member helps secure the speaker unit in place and prevents sound absorbing material from entering the internal space of the speaker, thereby maintaining acoustic performance without requiring detachable breathable gauze.
3Reliability
If sound absorbing material is placed in internal cavity, then acoustic effect is improved, but material enters internal space of speaker
Solution Approach 1:
The speaker structure is segmented into distinct functional zones: the first sound absorbing cavity, the second sound absorbing cavity, and the speaker unit housing. The communication port provides controlled connection between cavities while the buffer member creates a barrier that prevents sound absorbing material from migrating into the speaker unit's internal space, thus avoiding harmful material intrusion.
Solution Approach 2:
The buffer member serves as a protective intermediary between the sound absorbing material and the speaker unit. It allows acoustic benefits to be achieved while physically blocking sound absorbing material from entering the internal space of the speaker where it would cause harm to acoustic performance.
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 enhances sound quality by increasing the capacity for sound absorbing materials, reducing material detachment issues, and thereby improving the overall acoustic effect of the speaker.
Implementation Method 1
a first sound absorbing cavity defined by the breathable spacer and the lower housing and receiving a sound absorbing material
Data Source
AI summary
A speaker includes an upper housing; a lower housing assembled with the upper housing to define a receiving space; and a speaker unit received in the receiving space and including a diaphragm. The upper housing includes a top wall, a side wall extending from the top wall towards the lower housing, and a blocking wall extending from the top wall along a direction facing away from the top wall and spaced apart from the side wall. The blocking wall, side wall and top wall define a receiving portion receiving the speaker unit. A breathable spacer is provided at an end of the top wall and is spaced apart from the lower housing to form first sound absorbing cavity. A side of the blocking wall facing away from the speaker unit, the side wall and the lower housing define second sound absorbing sound cavity communicating with the second sound absorbing cavity.