Department of Psychology, Idaho State University, Pocatello, Idaho, USA.
Psychophysiology. 2010 Mar 1;47(2):393-401. doi: 10.1111/j.1469-8986.2009.00941.x. Epub 2009 Dec 17.
Vaginal pulse amplitude (VPA) has been the most commonly analyzed signal of the vaginal photoplethysmograph. Frequent, large, and variable-morphology artifacts typically have crowded this signal. These artifacts usually were corrected by hand, which may have introduced large differences in outcomes across laboratories. VPA signals were collected from 22 women who viewed a neutral film and a sexual film. An automated, wavelet-based, denoising algorithm was compared against the uncorrected signal and the signal corrected in the typical manner (by hand). The automated wavelet denoising resulted in the same pattern of results as the hand-corrected signal. The wavelet procedure automated artifact reduction in the VPA, and this mathematical instantiation permits the comparison of competing methods to improve signal:noise in the future.
阴道脉搏幅度（VPA）一直是阴道光体积描记法中分析得最多的信号。通常，频繁、幅度大且形态多变的伪影会充斥这个信号。这些伪影通常需要手动纠正，这可能会导致不同实验室的结果产生很大差异。从观看中性电影和色情电影的 22 名女性那里收集了 VPA 信号。一种基于小波的自动去噪算法与未校正信号和典型方式（手动）校正的信号进行了比较。自动小波去噪产生的结果与手动校正信号的结果相同。该小波程序自动减少了 VPA 中的伪影，这种数学实例允许未来比较改进信号：噪声的竞争方法。
