So I have read other articles about tips for hearing a blood pressure. Get new ear tips, get a high quality stethoscope, be in a quite room, get a stethoscope with a microphone etc.... I have literally tried all of these and still no success. There is WAY to much white noise going on. I am not sure how to filter out the white noise? I am using a microphone stethoscope now, and still a lot of noise. It occurs when I am holding the diaphragm against their arm and when they breath, it moves slightly creating noise. I also got my hearing checked and am fine. I am so stressed about this. Any other ideas? I have spent over $500 trying different stethoscopes but all have the white noise issue.