In-Ear Headset Mechanical Filter for Moisture Protection

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Solution Overview

Problem

Existing headsets and earphones are not suitable for use in changing weather conditions due to exposure to dirt and moisture, which can compromise their functionality.

Innovation Solution

A headset and in-ear earphone design featuring a mechanical filter in the acoustic channel that protects against dirt and moisture, while maintaining acoustic integrity, with options for the filter to be fine-meshed gauze, diaphragm, or hydrophobic units, and the ability to be replaced, ensuring the electronics and acoustic components remain protected and functional.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the acoustic channel is open from the exterior to the front volume, then acoustic signals can pass through freely, but dirt and moisture can enter and damage the internal components

Engineering Contradiction:

Improveprotection against dirt and moistureVSAvoidacoustic impairment

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a mechanical filter with porous or mesh-like structure that allows acoustic waves to pass through while physically blocking dirt and moisture particles. The filter material is selected to have pore sizes that permit sound transmission but prevent contamination, thus resolving the contradiction between open acoustic channel and protection requirements.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The mechanical filter acts as an intermediary element placed within the acoustic channel, serving as a mediator between the external environment and the internal earphone components. It allows acoustic energy to pass through while blocking harmful contaminants, thus protecting internal components without impairing acoustic signal transmission.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a mechanical filter is added to protect against dirt and moisture, then protection is improved, but the device complexity increases

Engineering Contradiction:

Improveprotection against dirt and moistureVSAvoidfilter assembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent integrates the mechanical filter directly into the existing acoustic channel structure of the earphone, merging the protection function with the existing acoustic pathway. This combination approach adds the necessary protection while minimizing the increase in device complexity by utilizing the existing structural framework.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mechanical filter is implemented as a thin film or flexible membrane that can be easily incorporated into the earphone structure. This thin-film approach provides effective protection against dirt and moisture while adding minimal structural complexity and maintaining a compact design.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If the mechanical filter is permanently installed, then protection is maintained, but maintenance and replacement become difficult

Engineering Contradiction:

Improvecontinuous protectionVSAvoidfilter replacement ease

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The patent designs the mechanical filter as a segmented or modular component that can be independently accessed and replaced. The filter is separated from the main earphone body or designed with quick-release mechanisms, allowing users to easily remove and replace the filter without disassembling the entire device, thus maintaining continuous protection while enabling easy maintenance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mechanical filter is designed as a disposable or easily replaceable component with a simplified structure that reduces manufacturing cost. This approach allows users to periodically replace the filter without significant expense or complexity, ensuring continuous protection while maintaining ease of repair through simple replacement procedures.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 mechanical filter effectively seals the channel against dirt and moisture without impairing acoustics, allowing the headset to function reliably in adverse weather conditions, with easy replacement and protection of internal components, including microphones for active noise compensation.

Implementation Method 1

a mechanical filter for protecting against dirt and/or moisture is disposed in the first channel

Methodology Applied

Scientific EffectMechanical filtration: Filter (physical)

Implementation Method 2

the mechanical filter is configured as a fine-meshed gauze, as a diaphragm, and/or as a hydrophobic unit

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Data Source

PatentUS8111857B2In-ear headset and in-ear earphone

Publication Date: 2012.02.07 SENNHEISER ELECTRONICS GMBH & CO KG

AI summary

The invention relates to a headset comprising at least one earphone and a headset microphone for registering voice signals of the headset wearer. The headset microphone is fixed to one of the earphones. The earphone comprises at least one electroacoustic transducer, a rear volume, and a front volume which lies in front of the electroacoustic transducer. A first channel runs from the exterior through the earphone to the front volume. In addition, at least one acoustic filter and/or a microphone is arranged inside the first channel, in which a mechanical filter which protects against dirt and/or moisture is also disposed.