Basic Biological Signal Monitoring

摘要

Given the popularity of electronic fitness watches from Fitbit, Apple, Polar, and others, monitoring your heart rate is perhaps the easiest and most popular form of biological signal monitoring (I'm excluding non-technology enabled forms of monitoring, such as a finger over a pulsing artery or a hand over a warm forehead). Whether we're talking heart rate, blood pressure, blood glucose level, or blood oxygenation, biological signals share several properties: irregularity; association with conditions; they favor specific modes of detection; and they are accompanied by noise.