Synchronized and noise-robust audio recordings during realtime magnetic resonance imaging scans (L)
Synchronized and noise-robust audio recordings during realtime magnetic resonance imaging scans (L)
复制标题
DOI：
10.1121/1.2335423
复制
发表时间：
2006-10-01
影响因子：
2.4
通讯作者：
Narayanan, Shrikanth
中科院分区：
文献类型：
--
作者：
Bresch, Erik;Nielsen, Jon;Narayanan, Shrikanth
这封信描述了一种数据采集装置，用于在磁共振成像(MRI)扫描仪中记录和处理个人运行的语音。主要的重点是确保图像和音频采集之间的同步性，并获得良好的信噪比，以便于进一步的语音分析和建模。描述了一种基于现场可编程门阵列的硬件设计，用于使扫描仪图像采集与音频等其他外部数据同步。音频设置本身具有两个光纤麦克风和一个噪声消除过滤器。描述了两种噪声消除方法，包括使用MRI扫描仪的梯度噪声的脉冲序列特定模型的新方法。这一设置对科学的语音产生研究是有用的。给出了用该方法采集和处理的语音和歌唱数据的样本结果。(C)2006年美国声学学会。
This letter describes a data acquisition setup for recording, and processing, running speech from a person in a magnetic resonance imaging (MRI) scanner. The main focus is on ensuring synchronicity between image and audio acquisition, and in obtaining good signal to noise ratio to facilitate further speech analysis and modeling. A field-programmable gate array based hardware design for synchronizing the scanner image acquisition to other external data such as audio is described. The audio setup itself features two fiber optical microphones and a noise-canceling filter. Two noise cancellation methods are described including a novel approach using a pulse sequence specific model of the gradient noise of the MRI scanner. The setup is useful for scientific speech production studies. Sample results of speech and singing data acquired and processed using the proposed method are given. (c) 2006 Acoustical Society of America.