Search for dissertations about: "retention magnet"

Found 3 swedish dissertations containing the words retention magnet.

  1. 1. A New Audiometric Bone Vibrator, Radioear B81, and the Bone Conduction Implant with Emphasis on Magnetic Resonance Imaging

    University dissertation from Chalmers University of Technology

    Author : Karl-Johan Fredén Jansson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; balanced electromagnetic separation transducer; bone conduction; bone vibrator; retention magnet; image artifact; demagnetization; magnetically induced torque; magnetic resonance imaging.;

    Abstract : Hearing by air conduction (AC) and bone conduction (BC) are attributed to be the natural ways of stimulating the cochlea. With AC hearing, the cochlea is stimulated by air pressure variations via the ear canal, whereas with BC hearing, sound vibrations are transmitted thru the skull bone to the cochlea. READ MORE

  2. 2. The Balanced Electromagnetic Separation Transducer for Bone Conduction Audiometry and Hearing Rehabilitation

    University dissertation from Chalmers University of Technology

    Author : Karl-Johan Fredén Jansson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; demagnetization; image artifact; magnetic resonance imaging; bone vibrator; balanced electromagnetic separation transducer; magnetically induced torque; retention magnet; bone conduction;

    Abstract : Hearing via air conduction (AC) and bone conduction (BC) are attributed to bethe natural ways of conducting sound to the cochlea. With AC hearing, air pressurevariations are transmitted to the cochlea via the ear canal, whereas with BChearing, sound vibrations are transmitted through the skull bone to the cochlea. READ MORE

  3. 3. Applications of Magnetic Tracers in the Human Lung and Gastrointestinal Tract

    University dissertation from Chalmers University of Technology

    Author : Mikael Forsman; Chalmers tekniska högskola.; Chalmers University of Technology.; [1995]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN; MEDICINE; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; magnetopneumography; MPG; occupational health; inhaled particles; welding dust; pulmonary clearance; inverse solution; multipole analysis; gastrointestinal motility; gastric emptying; transit time;

    Abstract : The use of ferrimagnetic material as a tracer represents a noninvasive approach in physiological measurements. Concerning the lung, magnetopneumography, MPG, is a unique technique to estimate retained dust in the lung, using the magnetizable dust fraction as a tracer. First a strong constant magnetic field is briefly applied to the thorax. READ MORE