Waterproof Speaker Assembly With Pressure Equalization Membrane
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Solution Overview
Problem
Existing waterproof speaker assemblies in headsets and hearing protection devices face challenges in rapid decompression and maintaining acoustic quality when exposed to changing ambient pressures, such as during parachute jumps or submersion in water, as they often compromise on acoustic properties to achieve waterproofing.
Innovation Solution
A waterproof speaker assembly with a scalable housing and a permeable pressure equalization membrane, along with a slave membrane, allows for efficient decompression while retaining high sensitivity and low resonance frequency, ensuring both rapid decompression compatibility and good audio quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the speaker assembly is enclosed in a closed volume to make it waterproof, then waterproofing is achieved, but decompression capability deteriorates
Solution Approach 1:
The patent employs a flexible membrane that selectively separates the speaker unit from the external environment. This membrane allows pressure equalization while maintaining waterproofing, enabling the speaker assembly to decompress rapidly when needed without compromising the waterproof seal. The flexible membrane acts as a dynamic barrier that adapts to pressure changes.
Solution Approach 2:
The patent utilizes a porous membrane structure that permits air and pressure equalization while blocking water. The porous configuration allows decompression gas to pass through during pressure changes, enabling rapid decompression capability while maintaining the waterproof integrity of the enclosed volume.
2Speed
If the closed volume is reduced to improve decompression, then decompression capability improves, but acoustic quality deteriorates
Solution Approach 1:
The flexible membrane creates a sealed enclosure that maintains adequate volume for acoustic quality while enabling rapid decompression. The membrane's flexibility allows the enclosure to accommodate pressure changes without requiring volume reduction, thus preserving both acoustic performance and decompression speed.
Solution Approach 2:
The membrane serves as an intermediary element between the speaker unit and the external environment. It mediates the interaction by allowing pressure equalization and decompression while maintaining the enclosed volume necessary for good acoustic quality. The membrane acts as a selective barrier that enables decompression without compromising acoustic performance.
3Reliability
If waterproof damping felt is used to make the speaker assembly waterproof, then waterproofing is achieved to some extent, but the waterproof characteristic deteriorates at greater depths
Solution Approach 1:
The patent replaces waterproof damping felt with a porous membrane that provides superior waterproofing performance. The porous structure maintains effective water blocking at greater depths while still allowing pressure equalization. This membrane-based approach overcomes the depth limitations of traditional damping felt waterproofing.
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 enables efficient decompression and maintains high audio quality in changing pressure environments, meeting rapid decompression specifications and providing clear communication and situational awareness, while being compact and resistant to water exposure.
Implementation Method 1
a waterproof pressure equalization element being permeable to air... configured to equalise pressure changes between the interior or cavity and the waterproof speaker housing
Implementation Method 2
The slave membrane is configured to release the audio frequency signal to outside of the waterproof speaker assembly... acoustically connected with the interior or cavity
Implementation Method 3
a speaker unit comprising a transducer configured to generate an audio frequency signal in response to a received electrical signal
Data Source
AI summary
The present invention relates to a headset and/or a hearing protection device (300) comprising a, the waterproof speaker assembly (100) comprising a speaker unit (101) comprising a transducer configured to generate an audio frequency signal, a waterproof speaker housing (103), wherein the waterproof speaker housing (103) is configured to receive and sealable enclose, in part or in full, the speaker unit (101) in an interior or a cavity (107) of the waterproof speaker housing (103), and a waterproof pressure equalization element (105) being permeable to air, wherein the waterproof speaker housing (103) is configured to receive and/or support the waterproof pressure equalization element (105), and the waterproof pressure equalization element (105) is configured to equalize surrounding or ambient pressure changes from the interior or cavity (107) of the waterproof speaker housing (103).