Bao Hua, Panahi Issa M S
Department of Electrical Engineering, The University of Texas at Dallas, Richardson, TX 75082, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2010;2010:4323-6. doi: 10.1109/IEMBS.2010.5626197.
Non-uniform frequency response of human hearing system requires conventional active noise control (ANC) system to be modified. Psychoacoustic active noise control (PANC) system based on filtered-E least-mean-square (FELMS) structure aims to improve the noise attenuation performance in terms of hearing perception. ITU-R 468 noise weighting reflects human hearing response to random noise. In this paper we incorporate ITU-R 468 noise weighting into PANC system. Sound quality analysis is conducted for attenuated noise with a predictive pleasantness model which combines four psychoacoustic parameters (loudness, sharpness, roughness and tonality). Simulation on realistic MRI acoustic noise shows improvement of sound quality in the new system.
人类听觉系统的非均匀频率响应要求对传统有源噪声控制（ANC）系统进行改进。基于滤波 - E 最小均方（FELMS）结构的心理声学有源噪声控制（PANC）系统旨在从听觉感知方面提高噪声衰减性能。ITU-R 468 噪声加权反映了人类听觉对随机噪声的响应。在本文中，我们将 ITU-R 468 噪声加权纳入 PANC 系统。使用结合了四个心理声学参数（响度、尖锐度、粗糙度和音调）的预测愉悦度模型对衰减后的噪声进行音质分析。对实际 MRI 声学噪声的仿真表明新系统的音质有所改善。
