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

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.