The objective of this effort was to conduct acoustical tests of the Goulds Pumps located at the University of Wisconsin (UW) Walnut Street Heating Plant in Madison, Wisconsin. A sound level meter and an acoustical camera were used, which is capable of determining the source, direction, frequency content and magnitude of the sound from the pumps.
Previous acoustical noise surveys at the UW Walnut Street Heating Plant have identified high noise levels from the two Goulds pumps installed in the facility. These pumps, designated CWP-1 and CTP-1, were found to have sound levels of more than 95 dBa, which is 10dB higher than the maximum allowable sound level of 85dBa. Attempts to reduce the pump noise levels using sound attenuation shrouds that were constructed from MDF and fiberglass sound absorption materials were not successful. As a leading supplier of state-of-the-art sound attenuation materials, Acoustiblok was consulted to identify the specific sources of the noise and recommend practical solutions for reducing this noise to within acceptable limits.