Hearing Protector Loudspeaker Assembly Outer Shell Sealing
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Solution Overview
Problem
Existing hearing protectors are not user-friendly for prolonged use in noisy environments, as they often fail to allow the wearer to hear important sounds while providing inadequate durability and convenience, and are not cost-effective.
Innovation Solution
A hearing protector design featuring an ear cup with a shell and a loudspeaker assembly where the loudspeaker module is positioned on the outer side of the shell, sealed by a silicone seal member, and connected via a fastener with electronic circuitry, allowing for reliable sound transmission within safe noise levels and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the loudspeaker module is positioned inside the ear cup shell, then the hearing protector provides better noise isolation, but the electronic components are exposed to moisture and heat from the wearer's ear
Solution Approach 1:
The loudspeaker module is extracted from the interior of the ear cup shell and positioned on the outer side. This separation removes the electronic components from the harmful environment inside the ear cup, protecting them from moisture and heat while maintaining the noise isolation properties of the ear cup structure.
2Object-affected harmful factors
If the loudspeaker module is positioned on the outer side of the shell, then electronic components are protected from moisture and heat, but noise isolation may be compromised
Solution Approach 1:
A sealing member is introduced as an intermediary element between the ear cup shell and the loudspeaker module. This sealing member ensures that the noise isolation function is maintained by preventing sound leakage around the loudspeaker module, while allowing the module to be positioned on the outer side for environmental protection.
3Reliability
If a sealing member is used to seal the loudspeaker module, then noise isolation is improved, but the seal member may deteriorate over time due to environmental exposure
Solution Approach 1:
The sealing member is positioned on the outer side of the ear cup shell, enclosing the loudspeaker module in a protected environment. This external positioning shields the sealing member from the harsh internal environment (moisture, heat), thereby extending its service life and maintaining noise isolation effectiveness over time.
4Device complexity
If the hearing protector is designed for passive noise dampening only, then the structure is simple and inexpensive, but the wearer cannot hear important environmental sounds
Solution Approach 1:
The ear cup is designed to perform multiple functions: it provides passive noise dampening through its shell structure while simultaneously accommodating an active loudspeaker module for sound transmission. This multi-functionality allows the wearer to both block harmful noise and hear important sounds or audio signals.
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 design enhances user comfort and reliability by protecting electronic components from moisture and heat, providing effective noise attenuation and allowing safe sound transmission, while being cost-effective and easy to maintain.
Implementation Method 1
a seal member and a loudspeaker module, wherein at least a (preferably circumferential) portion of the seal member is arranged between the shell and a fastener which retains the loudspeaker assembly at the shell
Implementation Method 2
a noise absorber pad is arranged between the cushioning and the ear facing inner side of the shell
Implementation Method 3
The cushioning comprises a soft and resilient core material, for example a foamed plastic material and is preferably covered by a sheath
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A hearing protector (1) having an ear cup (11) forming a space for a wearer's ear. The ear cup has a shell (13) with an ear facing inner side (22) and a passageway extending through the shell between the ear facing inner side and an outer side (16) of the shell. The ear cup further has a loudspeaker assembly which seals the passageway from the outer side. The loud speaker assembly further has a seal member (18) and a loudspeaker module (17). A portion of the seal member is arranged between the shell and a fastener (25), and the fastener retains the loudspeaker assembly at the shell. The hearing protector facilitates manufacturing and maintenance and provides for maximize wearing comfort and technical reliability.