两种主动降噪听诊器的比较

介绍了采用简易防噪拾音器和主动反相降噪这两种电子听诊器的结构和工作原理.通过主观性听诊对比,以及使用频谱显示软件处理生物音信号,获得可视化效果,并作客观性比较.新型主动反相降噪听诊器的降噪效果优于采用简易防噪拾音器听诊器,具有心音、呼吸音和肠鸣音的显示功能,电路稳定可靠,操作方便,较好地解决了外界噪音干扰听诊的难题.

Comparison of Two Active Denoised Stethoscopes

It's to introduce the structure and operating principle of two electronic stethoscopes,one with a simple noise-stop pickup,while the other one with an active inverting denoiser.By subjective auscultation comparison and biological sounds processing via spectral view software,it got visual effects and made objective comparison.The new active inverting denoised stethoscope,the circuit of which is stable and reliable,can get a better denoised effect than the simple noise-stop pickup stethoscope.The new one is easy to operate,and can display the heart sounds,breath sounds and bowel sounds.It can solve the problem of external noise interfering auscultation better than other means.