摘要
首先完成对肺音信号的放大、滤波等预处理;然后对预处理的肺音信号进行外部A/D采样,并将采集肺音信号保存为.WAV音频文件存储于SD卡中;利用短时傅立叶变换完成了对肺音信号的时频域分析。通过该系统可以准确地检测到病人的肺音信号,并且利用立体声耳机可以实现对病人的同步听诊。
Firstly, system complete preprocessing including amplification, fihering, etc. of lung sound signal, external A/D sampling is carried out on preprocessed lung sound signal, and the acquired lung sound signals are saved as . WAV audio file stored in SD card, and using short time Fourier transform （STFF）to complete the time- frequency domain analysis on lung sound signals. Through the system, patient＇ s lung sound signals can be accurately detected, and using stereo headphones, synchronous auscultation of patient can be realized.
出处
《传感器与微系统》
CSCD
2016年第6期96-98,103,共4页
Transducer and Microsystem Technologies
基金
重庆市科委国际科技合作项目(CSTC2012GG-GJHZ0023)
关键词
便携式
肺音采集
短时傅立叶变换
时频域分析
portable
lung sound acquisition
short time Fourier transform （STFT）
time-frequency domain analysis
