Summary
A new electrostatic body resonance microphone of unusually high capacity is described. Its great sensitivity, linear frequency range between 0.1 and 200 Hz, low hysteresis, robust mechanical structure, small readings and its light weight make it particularly suitable for pulse registration in humans and animals.
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Boucke, H., Brecht, K. Neuartiges « Infraton »-Mikrophon und seine Anwendung in Physiologie, Medizin und Technik. Experientia 8, 275–276 (1952). https://doi.org/10.1007/BF02301398
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DOI: https://doi.org/10.1007/BF02301398