Cheer Jordan, Patel Vinal, Fontana Simone
Institute of Sound and Vibration Research, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
HUAWEI European Research Center, Riesstrasse 25 C3.0G, 80992, Munich, Germany.
J Acoust Soc Am. 2019 May;145(5):3095. doi: 10.1121/1.5109394.
Active noise cancelling (ANC) headphones have seen significant commercial success and a number of control strategies have been proposed, including feedforward, feedback, and hybrid configurations, using both analogue and digital implementations. Irrespective of the configuration or implementation approach, the strategies proposed in the open-literature have focused on implementations where the control system for each ear of the headphones operates independently. In this paper, a multi-reference ANC strategy is proposed and investigated for noise cancelling headphones. As with standard feedforward ANC headphones, the system utilises a single error microphone and single reference microphone on each cup; however, in the proposed configuration, the left and right reference microphones are used to achieve control at both the left and right ear cups. The performance of this controller design is compared to a standard single reference feedforward controller implementation under a variety of different sound field conditions. Although the proposed strategy requires an increased computational demand, it is shown that there is a significant control advantage for noise sources originating from the side of the user, whilst the performance for front and rear sources is maintained.
主动降噪（ANC）耳机已取得显著的商业成功，并且已经提出了许多控制策略，包括前馈、反馈和混合配置，采用了模拟和数字实现方式。无论配置或实现方法如何，公开文献中提出的策略都集中在耳机每只耳朵的控制系统独立运行的实现方式上。本文提出并研究了一种用于降噪耳机的多参考ANC策略。与标准的前馈ANC耳机一样，该系统在每个耳罩上使用一个误差麦克风和一个参考麦克风；然而，在所提出的配置中，左右参考麦克风用于在左右耳罩处都实现控制。在各种不同的声场条件下，将这种控制器设计的性能与标准的单参考前馈控制器实现方式进行了比较。尽管所提出的策略需要增加计算量，但结果表明，对于源自用户侧面的噪声源，该策略具有显著的控制优势，同时对于前后方向的噪声源，其性能也能得到保持。
