Sec.14-80a-6a. Instrumentation

(a) Sound level meter: The sound level meter shall meet or exceed the requirement of American National Standard Specification for sound level meters (ANSI S1.4-1971), approved April 27, 1971 and issued by the American National Standards Institute, for Types 1, II or S sound level meters.

(b) Sound level calibrator: A sound level calibration instrument of the coupler type shall be used to calibrate the sound level meter in decibel units and such instrument shall produce a calibration sound pressure level having a tolerance no greater than ±.3dB with a reference sound pressure level of 20 micronewtons per square meter.

(c) Anemometer: An anemometer for use in measuring the wind speed at the test site shall be capable of indicating wind speed up to 20 MPH (32.2 km/h) and shall be accurate to within ten percent of the indicated reading.

(d) Remote instrument location system: The sound level meter may be remotely located from the microphone by a cable system connected and used in compliance with the sound level meter manufacturer's recommendations.

(Effective June 1, 1978)