Portland State University. Department of Speech Communication
James F. Maurer
Date of Award
Master of Science (M.S.) in Speech Communication
1 online resource (94 p.)
This study investigated the following questions: 1) What is the spectra of human heart sounds when transmitted to the listener's ear through amplified and acoustic stethoscopes? 2) How does the acoustic spectrum of normal heart sounds compare to the threshold of audibility for normal hearing sensitivity? 3) Do normal hearing listeners elect to listen to heart sounds at a higher intensity than the acoustic stethoscope is able to transmit?
Oliver, Sara Ruth Ann, "In situ measurements of two amplified and one acoustic stethoscope" (1989). Dissertations and Theses. Paper 3932.