Wavelet analysis method is applied to denoise call signals, detect pitch and improve sonogram. The optimum parameters of wavelet denoise are obtained.
将小波分析方法引入到鸣声信号的消噪、基音周期检测和语图的改进中。
参考来源 - 珍稀鸟类朱鹮鸣声特征与行为关系的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N a three-dimensional representation of a sound signal, using coordinates of frequency, time, and intensity 声谱图 [physics]
Purpose: to find out some reliable evidences on the sonograms of pheochromocytoma (pheo) to clinch clinical diagnosis.
目的：旨在探寻嗜铬细胞瘤(PHEO)声像图规律，为临床诊治提供可靠依据。
Objective To evaluate the histopathological basis which determines the sonograms echo characteristic of liver solid masses.
目的了解决定肝实性占位病变超声回声特性的病理组织学基础。
Objective To explore different appearances of fibrinous string on sonograms of tuberculous and malignant pleural effusions.
目的探讨结核性和恶性胸腔积液中纤维回声带的不同表现。
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