【摘要】 考察了虚拟传声器应用于有源抗噪声护听器的稳定性和降噪性能。理论上分析了虚拟传声器算法的稳定性,并通过引入反馈控制器和设计次级通道模型使得算法在不同护听器佩戴方式下都保持稳定,获得高噪声衰减和高稳定性。实验结果证实了虚拟传声器的应用可以在耳道口获得更高的窄带噪声衰减,而且所采取的措施可以保证护听器在不同佩戴状态下都能稳定。更多还原

【Abstract】 This paper investigates the stability and noise reduction of active noise reduction headset when virtual microphone is used.The stability of the virtual microphone algorithm is analyzed theoretically.By introducing feedback controller and designing the secondary path model,the algorithm can operate steadily when the position of the headset varies,thus large noise reduction can be achieved with better stability.Experiment confirms that the application of virtual microphone can result in larger narrowband noise reduction at the ear canal entrance,and the proposed measures can ensure stability in different headset positions.更多还原