[Methods of controlling respiratory phases in man at rest and during physical exertion].

A method and apparatus for contactless h. f. spirometry are recommended for recording the patient pneumogram during his labor activity. This method allows to fix the respiration phase without distortions, caused as a rule, by movements of the patient under control. In this respect it is advantageous as compared with this method of respiration records by means of tensometric or thermoanemometric transducer, and by impedance pneumography.