A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is
Several closed headsets were evaluated for use by sonar operators. Their frequency response and degree of variability were measured and compared to other headsets which were open to outside noise. The advantages and disadvantages of open and closed headsets are discussed and recommendations made. 4 a iii DD J JAN 73 1473 EDITION OF 1 NOV 65 IS OBSOLETE Unclassified S/N 0102-014-6601 SECURITY CLASSIFICATION OF THIS PAGE (When Data Rnteted)doi:10.21236/ada446333 fatcat:thc3mcdruvd7tmyclmai7ygzeu