Cal. Code Regs. Tit. 13, § 1025 - Testing Sites
Sites for laboratory or field tests of sirens shall comply with the following requirements:
(a)
Laboratory Tests. A laboratory test site shall consist of an anechoic chamber
that meets the requirements of ANS S
1.13-1971.
(b) Open Field Tests. An open field test site
for mechanical siren testing shall consist of a flat paved area at least 15 m
(49 ft) in diameter and free of large vertical sound-reflecting surfaces within
15 m (49 ft) of the microphone and siren except for the test vehicle.
Notes
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 26103 and 26104, Vehicle Code.
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