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基于听觉特性优化的级联型均衡滤波器设计
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作者 吕雨贞 刘紫赟 沈勇 《电声技术》 2023年第4期132-136,共5页
受扬声器品质、房间反射等因素的影响,声音信号会出现失真。为了改善声重放效果,使用均衡滤波器对扬声器的频率响应进行均衡。考虑到人耳听觉特性和滤波器参数估计,提出了对数尺度上系统频率响应与目标频率响应之差的代价函数,设计了由... 受扬声器品质、房间反射等因素的影响,声音信号会出现失真。为了改善声重放效果,使用均衡滤波器对扬声器的频率响应进行均衡。考虑到人耳听觉特性和滤波器参数估计,提出了对数尺度上系统频率响应与目标频率响应之差的代价函数,设计了由若干个Regalia-Mitra滤波器级联而成的均衡滤波器,并将其应用于小房间的音箱频率响应均衡。结果表明,设计的均衡滤波器能较好地减少扬声器频率响应与目标频率响应的差异。 展开更多
关键词 扬声器频率响应 人耳听觉特性 均衡滤波器 响应均衡
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Improving the high frequency response of a loudspeaker using hydrogen-free diamond-like carbon film coating at low temperature 被引量:2
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作者 LIN ChiiRuey LIU ShinHwa +1 位作者 LIOU WangJeng CHANG ChienKuo 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第3期385-391,共7页
Hydrogen-free diamond-like carbon (DLC) thin films were deposited at low temperature (less than 100~C) by an RF magne- tron sputtering facility. DLC films have the ability to change the sound velocity (E/p) in l... Hydrogen-free diamond-like carbon (DLC) thin films were deposited at low temperature (less than 100~C) by an RF magne- tron sputtering facility. DLC films have the ability to change the sound velocity (E/p) in loudspeakers for applications of hard coating. The hydrogen-free DLC films were coated onto PEI diaphragm substrates. The ID/IG ratio and the surface roughness are 2.09 and less than 0.86 nm (Ra) with a scanning area of 50 um x 50 um, respectively. Frequency response analysis of the DLC films on the diaphragm shows that the high frequency response increases by 0.2 dB-5.1 dB (6 kHz-ll.2 kHz), -0.4 dB-1.8 dB (11.8 kHz-20 kHz) on average. On the basis of the results of this study, we validated that it was feasible to sputter hydrogen-free DLC films on polymer substrates for mass production. These results also provided useful parameters for future applications of electro-acoustic devices. 展开更多
关键词 DLC thin films coating DIAPHRAGM frequency response physical vapor deposition
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