Open-Ear Hook Headphone Vent Layout for Noise Cancellation

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Solution Overview

Problem

Traditional ear hook-type headphones face challenges in achieving effective noise cancellation and comfort during long listening sessions due to improper speaker and microphone placement, which is not suitable for open-ear designs.

Innovation Solution

An open-ear hook-type wearable sound producing device with strategically positioned speakers and microphones, including a forward vent and inverse vent, optimized within specific spatial coordinates, forming a feedback noise cancellation system to enhance noise cancellation performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If traditional ear hook-type headphones seal the ear canal to form a pressure sound field for bass, then bass quality is improved, but comfort during long listening sessions deteriorates and the design is not suitable for open-ear applications

Engineering Contradiction:

Improvebass qualityVSAvoidcomfort during long listening sessions

Core Design Contradiction:

Illumination intensityVSEase of operation

Solution Approach 1:

The patent inverts the traditional approach by not sealing the ear canal but instead using forward and inverse vents to create acoustic pressure differences. The speaker faces the ear canal without contact, and the inverse vent on the opposite side creates a pressure balance system that eliminates the need for ear canal sealing while maintaining bass quality.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces forward and inverse vents as intermediary elements between the speaker and the ear. These vents mediate the acoustic pressure distribution, allowing bass reproduction without direct contact or sealing of the ear canal, thus improving comfort during long listening sessions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If speaker and microphone positions are not properly arranged, then device complexity is reduced, but active noise cancellation performance deteriorates

Engineering Contradiction:

Improvespeaker and microphone arrangementVSAvoidactive noise cancellation performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies local quality by positioning the microphone at a specific distance (0.5 to 10 mm) from the ear canal entrance and the speaker at a specific distance (0.1 to 50 mm) from the ear canal entrance. This localized positioning optimization ensures effective noise cancellation without requiring complex coordination between components.

Inventive Principle:

Principle #3Local quality

3Reliability

If the speaker is positioned closer to the ear canal entrance, then noise cancellation performance is improved, but the risk of occlusion and discomfort increases

Engineering Contradiction:

Improvenoise cancellation performanceVSAvoidcomfort and occlusion risk

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The forward vent acts as an intermediary between the speaker and the ear canal, allowing the speaker to be positioned close to the ear canal entrance for effective noise cancellation while preventing direct contact and occlusion. The vent mediates the acoustic interaction without requiring physical sealing.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 device provides improved noise cancellation and comfort for long listening sessions by optimizing speaker and microphone placement, ensuring better bass and sound quality without sealing the ear canal.

Implementation Method 1

a front cavity is arranged in the main body, and both the diaphragm of the at least one speaker and the at least one microphone are located in the front cavity

Methodology Applied

Scientific EffectAcoustic wave propagation: Sound

Implementation Method 2

a distance between a pickup end of the at least one microphone and the EEP is 0.5 to 10 mm

Methodology Applied

Scientific EffectAcoustic detection: Sound

Data Source

PatentUS12532104B2Open-ear hook-type wearable sound producing device

Publication Date: 2026.01.20 SHENZHEN DASHI SCI & TECH CO LTD

AI summary

The present invention discloses an open-ear hook-type wearable sound producing device, including a main body and an ear hook connected to the main body, wherein at least one speaker and at least one microphone are arranged in the main body; one side, facing a human ear, of the main body is provided with a forward vent; a distance between the orifice of the forward vent and an ear canal entrance point (EEP) is 0.1 to 50 mm; and a distance between a pickup end of the at least one microphone and the EEP is 0.5 to 10 mm. The structure and layout of the present invention are rational, which is helpful to improve noise cancellation performance and is suitable to wear for long listening sessions.