1932 19 Feb. 210/2 It is believed that further progress in the science of noise measurement is necessary before effective standardization of this phase of the subject can be completed.
1957 108 1642/2 Noise measurements have been made on a three-level, 2800-Mc/sec solid state maser.
1988 19 Apr. b1/3 Noise measurements taken last summer registered more than 100 decibels.