南京大学学报（自然科学版）2025，Vol.61Issue(5)：794-804,11.DOI:10.13232/j.cnki.jnju.2025.05.008
有源降噪头靠中两种次级源布放下人头平移的降噪量变化
Noise reduction variation due to the head translation in active noise control headrests with different placements of secondary sources
摘要
Abstract
Active noise control headrests have attracted widespread attention in practical applications due to their good low-frequency performance and simple structure.For active noise reduction headrests with limited adaptive convergence speed,the noise reduction at the ears will significantly decrease when the human head deviates from the calibrated location.The variation law of noise reduction caused by the translation of the human head is investigated in active noise reduction headrests with two typical placements of secondary sources.Firstly,an analytical model for active noise reduction headrest with fixed control filter coefficients is established considering the acoustic scattering of a rigid sphere.Then,numerical simulations are conducted to verify the accuracy of the proposed model,and the attenuation of noise reduction at the ear after head translation is analyzed in the diffuse sound field.It is found that the attenuation of noise reduction due to the forward and backward translation is smaller when secondary sources are placed on both sides of the headrest,while the attenuation due to the leftward and rightward translation is smaller when secondary sources are placed on the shoulder of the seat.The main reason is that the changes in the secondary path during head translation are affected by the placement of secondary sources.Finally,experiments are conducted in the reverberation room to verify the numerical simulation results.关键词
有源降噪头靠/次级源布放/人头平移/固定控制滤波器Key words
active noise control headrest/secondary source placement/head translation/fixed control filter分类
数理科学引用本文复制引用
王有藩,王淑萍,邹海山,陶建成..有源降噪头靠中两种次级源布放下人头平移的降噪量变化[J].南京大学学报（自然科学版）,2025,61(5):794-804,11.基金项目
国家自然科学基金(11874218,12304521) （11874218,12304521）
