TEST OF PROJECT ARTEMIS ACOUSTIC SOURCE
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
The ARTEMIS acoustic source has been completed by the addition of the top row of five transducer modules. Concurrent with the installation of the additional transducer elements, the electrical connection to the elements was modified from a series-parallel connection to all-parallel configuration. The modification was performed to reduce the effects of acoustic interactions, which severely limited the power handling capability. Tests of the completed and modified source were conducted during July 1964 in Northwest Providence Channel. Results of the tests indicated a substantial increase in power handling capacity had been achieved with a maximum permissible source level, at the optimum frequency, of 148 decibels versus one dyne per square centimeter at one yard for pulsed sinusoidal excitation. The maximum allowable power, however, is a marked function of frequency, being especially limited at the upper end of the operating band. A non-rectilinear mode of vibration in the elements, as well as variations in loading due to acoustic interactions, contributed to the limitation of allowable power.
- Military Operations, Strategy and Tactics
- Acoustic Detection and Detectors