The numerical investigation of aerodynamics and aeroacoustics effects in a full-scale True Wireless headphone

IF 1.5 4区 工程技术 Q3 MECHANICS Journal of Mechanics Pub Date : 2023-08-10 DOI:10.1093/jom/ufad021
Wei-Hsiang Wang, Hua-Ching Chang, Ta-Yuan Cheng, Yu-Chien Chen
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Abstract

This study investigates the flow characteristics and aeroacoustic effects in a True Wireless (TWS) headphone using Computational Fluid Dynamics (CFD) simulations. A low-speed compressible flow solver is employed to analyze the flow fields and pressure variations associated with fluid-induced noise. The accuracy of the simulations is validated through comparisons with experimental and numerical data, demonstrating good consistency. The analysis reveals the presence of asymmetric vortex shedding patterns, attributed to the angle of airflow and the irregular surface of the headphones. The examination of the microphone chamber highlights the significance of design parameters in shaping flow patterns and acoustics. Optimized designs have the potential to achieve noise reductions of up to 10.62% or amplifications of up to 24.95%. These findings contribute to the development of improved Active Noise Cancellation (ANC) systems and the enhancement of TWS headphone technology, aiming to reduce external noise and enhance sound quality.
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全尺寸真无线耳机中空气动力学和空气声学效应的数值研究
本研究使用计算流体动力学(CFD)模拟研究了True Wireless(TWS)耳机中的流动特性和空气声学效应。采用低速可压缩流求解器来分析与流体诱导噪声相关的流场和压力变化。通过与实验和数值数据的比较验证了模拟的准确性,证明了良好的一致性。分析揭示了不对称涡流脱落模式的存在,这归因于气流的角度和耳机的不规则表面。麦克风室的检查突出了设计参数在形成流型和声学方面的重要性。优化设计有可能实现高达10.62%的降噪或高达24.95%的放大。这些发现有助于开发改进的有源噪声消除(ANC)系统和增强TWS耳机技术,旨在降低外部噪声并提高音质。
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来源期刊
Journal of Mechanics
Journal of Mechanics 物理-力学
CiteScore
3.20
自引率
11.80%
发文量
20
审稿时长
6 months
期刊介绍: The objective of the Journal of Mechanics is to provide an international forum to foster exchange of ideas among mechanics communities in different parts of world. The Journal of Mechanics publishes original research in all fields of theoretical and applied mechanics. The Journal especially welcomes papers that are related to recent technological advances. The contributions, which may be analytical, experimental or numerical, should be of significance to the progress of mechanics. Papers which are merely illustrations of established principles and procedures will generally not be accepted. Reports that are of technical interest are published as short articles. Review articles are published only by invitation.
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