Abstract: A device for measuring the pulse includes a pulse sensor of photoplethysmographic type preferably worn in the ear, comprising at least one light source, especially an infrared light source, and a component sensitive to the light emitted by the source, especially a single component, and a denoising system including an electronic preconditioning circuit designed to eliminate the slow artifacts of a signal representative of the pulse acquired by the light sensitive component and, at least one microcontroller designed to process the signal delivered by the electronic preconditioning circuit and eliminate the fast artifacts.