The sound level measurement system must meet or exceed the requirements of American National Standards Specification for Sound Level Meters, ANSI S1.4- 1971, approved April 27, 1971, issued by the American National Standards Institute[FN1], throughout the applicable frequency range for either:
(a) A Type 1 sound level meter;(b) A Type 2 sound level meter; or(c) A Type S sound level meter which has(1) A-weighting frequency response;(2) Fast dynamic characteristics of its indicating instrument; and(3) A relative response level tolerance consistent with those of either a Type 1 or Type 2 sound level meter, as specified in section 3.2 of ANSI S1.4-1971.N.Y. Comp. Codes R. & Regs. Tit. 6 § 451.2