Report of Test on Sirens, Types S1-S2 and S3-S4
[Technical Report, Formal Report]
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
The sample sirens were set up at this Laboratory in suitable test circuits where their performance was carefully observed for compliance with the requirements. An inspection of the samples, to determine compliance in the matter of materials, design and workmanship, concluded the test.