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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Capstone Model C30 Acoustic Emissions Appendix A: Test Measurement and Setup Sound Pressure Level Measurements The noise measurements described in this document were measured in an open area just outside of the Capstone facility. Care was taken to ensure that the influence of potential acoustic reflections from nearby walls and vehicles was minimized. The calculated noise contribution from potential reflecting surfaces did not exceed 0.4 dBA. Figure A-1 represents the typical test setup. Figure A-1. Typical Test Setup The measurements were recorded with an HP 35670A Dynamic Signal Analyzer and a Larson Davis microphone (with a 40 kHz bandwidth). Prior to taking measurements, the microphone was calibrated. Measurements were taken on a 5-meter radius from the estimated acoustic center of the enclosure. The microphone height was 1.5 meters above the ground. The noise data was A-weighted and was averaged over a 15 second interval using linear averaging. Measurements were taken at five points around the enclosure on a 5-meter radius centered on the acoustic center of the package (the stator housing). The reported data was then extrapolated to 10 meters from the measurements made at 5 meters. 410025-001 Rev A (September 2002) Page 6 of 36 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Guide for Capstone Turbine Model Number
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