Crisp Kevin M
Biology Department, St. Olaf College, Northfield, MN 55057.
J Undergrad Neurosci Educ. 2018 Sep 15;16(3):A210-A216. eCollection 2018 Summer.
For a few dollars and in a few minutes, a simple circuit can be built to permit a cheap external sound card and a laptop computer to be used as a portable data acquisition system for recording EMG. The circuit uses a common audio amplifier integrated circuit to increase the gain of the EMG signals recorded from EMG surface electrodes and to match the impedance of the electrode-skin interface with the input impedance of the sound card. Data can be recorded using open source sound editing software and analyzed offline using simple Python code. It is hoped that such activities provide opportunities to undergraduates to gain confidence as experimentalists and as innovators.
只需花费几美元，在几分钟内就能搭建一个简单电路，使廉价的外置声卡和笔记本电脑用作记录肌电图（EMG）的便携式数据采集系统。该电路使用一个常见的音频放大器集成电路来提高从肌电图表面电极记录的肌电信号增益，并使电极 - 皮肤界面的阻抗与声卡的输入阻抗相匹配。数据可以使用开源声音编辑软件进行记录，并使用简单的Python代码进行离线分析。希望此类活动能为本科生提供机会，让他们作为实验者和创新者获得信心。
