A sound level meter shall meet the American National Standards Institute standard for sound level meters found in "ANSI S.1.4 Type 1 or Type 2 Specifications for Sound Level Meters" (1971, 1983), and "ANSI S.1.4A".
Md. Code Regs. 08.18.03.04
A sound level meter shall meet the American National Standards Institute standard for sound level meters found in "ANSI S.1.4 Type 1 or Type 2 Specifications for Sound Level Meters" (1971, 1983), and "ANSI S.1.4A".
Md. Code Regs. 08.18.03.04