Krumbiegel, P.P.KrumbiegelHerbarth, O.O.HerbarthDespang, H.-G.H.-G.DespangOberst, E.E.OberstKleinmann, L.L.KleinmannFritzsch, H.H.Fritzsch2022-03-092022-03-091997https://publica.fraunhofer.de/handle/publica/327947Asthmatic and bronchitic attacks are often a reaction to air pollution. Such effects often fail to be detected during medical examinations, especially short-time sounding. To solve the problem of continuously monitoring human airway obstructions, an automatic miniature system was developed comprising the following elements: acoustic detector, frequency filter, recognition unit, registrator working on a time scale, data export module, power source. Wheezing was chosen as a characteristic pathological sound. Only typical frequencies are registered in a certain mode to optimize the likelihood of picking up true signals. The sensor is as small as a pocket-watch. It is fixed to the chest and worn there for a period of hours or days. Once the recording time is up, the sensor is returned to the physican. The data recorded are then transferred to a computer for evaluation. The sensor is currently being tested under field conditions on infants and schoolchildren.enMedizinmedizinische TechnikMeßaufnehmerPatientenüberwachungsensor621conference paper