Abstract: A method for monitoring respiration by illuminating the body of the subject with a luminous flux, where a lens is used to form on a set of photosensitive elements, an image of at least one region of the space within which a person under surveillance is capable of moving, a light source is used for illuminating the area, fine control and readout circuits are connected to the photosensitive elements, an analog to digital converter is to the control circuit, and a microprocessor is used to compare successive signals from the photosensitive elements and which is used to determine any significant variations in the successive signals which are due to respiration of the person being monitored. An alarm is also included which is triggered in response to an absence of variations on successive signals.

Abstract: A single-channel nerve stimulating device for auditory prosthesis for improving the conversational capacity of a profoundly deaf person is described. The single-channel device of simple construction provides detailed information to the patient's nervous system. The device comprises a microphone designed to pick up a sound signal and electronic processor which converts the sound signal into an electrical signal.