FIELD: medical engineering. SUBSTANCE: device has cylindrical air duct and sensitive tubes placed inside the duct. Air flow sensory member is attached to the lower ends of the sensitive tubes by means of connection tubes. Air dynamic members are additionally introduced into the design for forming and guiding air flow in the air duct. The nearest air dynamic member is mounted before the nearest sensitive tube and the far one is mounted behind the far tube. The sensitive tubes in the upper part are provided with slit for dropping pressure in the air flow. They are designed like the air dynamic members. The distance between the nearest air dynamic member and the nearest sensitive tube is equal to the distance between the far air dynamic member and the far sensitive tube. The selected version enables sensitive tubes to be protected against choking up with exhaled air products. EFFECT: increased device sensitivity; stable static properties. 1 dwg
