Inspec keywords: photoplethysmography; beverages; blood; medical signal detection; light emitting diodes

Other keywords: lighting; LED transmitter; diastolic blood pressure; PPG signal; LED receiver; breathalyser; noninvasive detection; drunk driving; photoplethysmography signal; noninvasive measurement; BAC; practical alcohol sobriety test system; photoplethysmogram signals; alcohol concentration; breath sample; alcohol intake; blood alcohol content; systolic blood pressure

Subjects: Haemodynamics, pneumodynamics; Digital signal processing; Signal detection; Light emitting diodes; Optical and laser radiation (medical uses); Patient diagnostic methods and instrumentation; Biology and medical computing; Optical and laser radiation (biomedical imaging/measurement)