PSEG West Orange Switching Substation West Orange NJ6524

Acoustical Evaluation of Station Upgrades PSE&G West Orange Switching Station, West Orange, NJ 5 June 2024 Page 14 APPENDIX DATA ACQUISITION AND ANALYSIS SYSTEMS The measurement system used to obtain acoustical data consisted of an HBK random-incidence condenser microphone 4189, used in conjunction with a preamplifier, HBK Model ZC 0032, and a precision sound level meter and octave band analyzer, HBK Model 2250. A windscreen was used on the microphone to reduce wind noise. For each measurement, the sound level meter was handheld, at an elevation 5 feet above grade, at a typical ear height. For the daytime on-site tests carried out close to equipment, the measurement technique used short averages, 10 seconds in duration. At the end of the measurement interval, the data were saved to internal memory for later analysis. The entire system was calibrated before and after the measurements by means of a sound pressure level calibrator. The calibrator used was a HBK Model 4231, last calibrated by an outside calibration service within one year of the measurement date. The calibration is traceable to the National Institute of Standards and Technology. Calibration certificates are available upon request. The measurement system complies with the requirements for a Type 1 meter given in ANSI/ASA S1.4 (Specification for Sound Level Meters) and IEC 61672 (Electroacoustics - Sound level meters - Part 1: Specifications). Overall, the data included in this report can be considered accurate to within a 1-decibel range. Software developed by HBK was used to recall the statistical octave band and A-weighted sound levels from the data provided by the analyzer. Microsoft Excel software was used to analyze the recalled data and perform acoustical calculations.