Headphone Air Flow Paths with Intersecting Axes
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Solution Overview
Problem
Air entering and exiting the hole portion in headphones can cause noise, deteriorating sound quality, and existing solutions require a noise-canceling microphone to mitigate this issue.
Innovation Solution
The headphone design incorporates multiple air flow paths with intersecting axes at their open ends, reducing noise by colliding and dissipating air flow, potentially eliminating the need for a noise-canceling microphone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hole portion is provided for air intake and discharge, then pressure changes inside the casing are eased and diaphragm contact with other parts is prevented, but noise such as wind noise is generated which deteriorates sound quality
Solution Approach 1:
The air flow path is divided into multiple separate paths (first air flow path and second air flow path) instead of using a single path. Each path has its own open end positioned at different locations, which segments the air flow and reduces the generation of vortices and noise while maintaining effective pressure equalization and diaphragm protection.
Solution Approach 2:
Different sections of the air flow paths are designed with different characteristics - the paths have specific shapes and cross-sectional areas that vary along their length. The open ends are positioned at specific locations (first open end and second open end) to optimize local flow characteristics and minimize noise generation at critical points in the air flow path.
2Object-generated harmful factors
If a microphone is added to cancel noise, then sound quality deterioration is prevented, but device complexity increases
Solution Approach 1:
The noise cancellation function is extracted from the electronic system (microphone and signal processing) and implemented through the acoustic design of the air flow paths themselves. By carefully designing the geometry and positioning of the multiple air flow paths and their open ends, the noise is passively reduced through acoustic principles, eliminating the need for additional electronic noise cancellation components.
Solution Approach 2:
The air flow path structure itself provides the noise reduction function without requiring external active components. The multiple paths with strategically positioned open ends create an acoustic environment that naturally reduces noise generation, allowing the system to self-regulate and eliminate the need for additional noise-canceling microphones or electronic processing.
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 configuration effectively reduces noise by minimizing air speed and vorticity, enhancing sound quality without requiring additional noise-canceling components.
Implementation Method 1
This configuration effectively reduces noise by minimizing air speed and vorticity
Implementation Method 2
reducing noise by colliding and dissipating air flow
Data Source
AI summary
The present invention provides a headphone, comprising: a casing in which a hole portion leading to the inside and outside is formed; a diaphragm; a support for supporting the diaphragm; and an air flow path for air taken from the outside of the casing to the inside through the hole portion, wherein a plurality of the air flow paths are provided, and extension directions of axes set on an open end surface on one side of the air flow paths intersect.