The report here submitted renders an account of the results obtained by measurements of the damping of ultrasound during passage from the abdominal surface to the uterine cavity in women in the reproductive age. Ultrasound was emitted from a transmission transducer on the abdominal surface and received by a specially designed miniature transducer introduced into the uterine cavity. The damping was found to average 2.5 dB.
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Jens M. Bang (1972) studied this question.
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