Earpiece Cavity Labyrinth Air Release

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Solution Overview

Problem

Existing earphones with double audio cavities suffer from excessive air accumulation in the front cavity, leading to vague and unclear sound quality due to uncontrolled air release, which affects the sound performance.

Innovation Solution

The ear cup cavity design features an annular labyrinth-type speaker cavity with strategically positioned air ports for controlled air release, including a first air port on the speaker face shell, a second air port on the speaker cavity, and a third air port on the rear shell, allowing superfluous air to be discharged without generating new noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If double audio cavities are used to enhance bass performance, then bass shock strength is improved, but air accumulation in the front cavity causes vague and unclear sound quality

Engineering Contradiction:

Improvebass shock strengthVSAvoidair accumulation affecting sound quality

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the harmful air accumulation from the front cavity by introducing a dedicated air discharge channel that connects the front cavity to the rear cavity. This allows the excess air to be removed from the sound-affecting front cavity while preserving the dual-cavity bass enhancement structure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary air discharge channel with a specific channel hole that mediates between the front cavity and rear cavity. This intermediary structure controls the air flow path, allowing air to be discharged from the front cavity through the channel hole into the rear cavity, thereby resolving the air accumulation problem without compromising the bass performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If air is discharged from the front cavity to improve sound quality, then clear sound is achieved, but uncontrolled air release may generate new noise

Engineering Contradiction:

Improveair accumulation causing vague soundVSAvoidnoise from uncontrolled air release

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent applies dynamics by making the air discharge process controllable rather than fixed. The channel hole's specific dimensions and the connection between cavities create a dynamic air flow path that adjusts during operation, allowing air to be discharged in a controlled manner that prevents noise generation while effectively removing air accumulation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameters of the air discharge path by specifying the channel hole's diameter (0.5-1.5mm) and its position. These parameter changes control the air flow characteristics, ensuring that air is discharged at a rate that prevents noise while effectively clearing the front cavity of excess air that would otherwise degrade sound quality.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If a simple air vent is used to release air, then air discharge is achieved, but the air release process cannot be controlled well and new noise is generated

Engineering Contradiction:

Improveair accumulation in front cavityVSAvoidcontrolled air release process

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent segments the air discharge function into specific components: the air discharge channel, the channel hole with specific dimensions (0.5-1.5mm), and the connection between front and rear cavities. This segmentation allows for precise control of the air release process, transforming a simple uncontrolled vent into a structured, controllable air management system that prevents noise while effectively removing air accumulation.

Inventive Principle:

Principle #1Segmentation

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 design effectively releases excess air from the front cavity, ensuring clear sound quality and enhancing user experience by preventing air accumulation from impacting sound performance.

Implementation Method 1

more air is gathered in the front cavity of the earphone due to outwards continuously played sound from the speaker

Methodology Applied

Scientific EffectAcoustic pressure: Acoustic Radiation Pressure

Data Source

PatentUS9635447B2Earpiece casing cavity and corresponding earphone

Publication Date: 2017.04.25 INNOVATION SOUND TECH

AI summary

The utility model discloses an ear cup cavity and a corresponding earphone, the ear cup cavity comprising: a speaker face shell (1), a speaker cavity (2), a speaker (3) and a rear shell (4); the speaker cavity (2) is an annular labyrinth type structure which is fixed on the speaker face shell (1); the speaker face shell (1) is provided with the first air port (11) through which air passes and enters into the speaker cavity (2); the second air port (21) through which air enters into the speaker cavity (2) is arranged on the position of the speaker cavity (2) corresponding to the first air port (11); the rear shell (4) is a bowl-shaped structure for accommodating the speaker cavity (2) and the speaker (3). The ear cup cavity and corresponding earphone provided in the embodiments of the utility model can timely release superfluous air gathered in the front cavity of the earphone, control the air release process well and avoid the generation of new noise so as to ensure clear sound played from the earphone and improve the user experience.