NASA NTRS · 19740000271
Volume measuring system
Abstract
Chamber is designed to be airtight; it includes face mask for person to breathe outside air so that he does not disturb chamber environment. Chamber includes piston to vary air volume inside. Also included are two microphone transducers which record pressure information inside chamber.
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Oele, J. S.. 1975-01-01. Volume measuring system. https://ntrs.nasa.gov/citations/19740000271
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