Commissioning Procedure Sample Clauses

Commissioning Procedure. When the pavilion is complete and the sound system and limiter have been installed, the designated professional performing testing on behalf of PS21 will commission the sound system limiter. PS21 shall coordinate the testing with the Town a minimum of 48 hours prior to initiating the testing. Pink noise shall be the signal used to commission the limiter. According to page 520 of Springer Handbook of Acoustics edited by Thomas D. Rossing (Springer 2007) pink noise is defined as follows:Pink noise has a spectral density that decreases inversely with the frequency. Consequently, pink noise decreases at a rate of 6 dB per octave. On average, every octave band has the same amount of power. Pink noise shall be played on all speakers of the venue sound system and the designated professional shall walk the perimeter of the pavilion at 10 feet outside of the roofline undertaking a series of short-term sound level measurements. The noisiest measurement position will be selected, and the designated professional will stand at this location and have the audio engineer controlling the sound system reduce the sound level of the pink noise until the reading measured by the designated professional at this particular location measures Leq 85 dBA, and set the limiter to not exceed the setting of the level of the sound system that resulted in that reading. Once the limiter is set, the pink noise will be turned off and then the designated professional shall undertake a series of ambient sound level measurements at the specified and agreed upon monitoring positions at the PS21 property line. Several Noise Indices will be recorded, but the index that will be used for the ambient noise when testing compliance of the sound system with the New York State Department of Environmental Conservation (“DEC”) noise guideline shall be an A-weighted equivalent continuous level averaged over a 30 minute period (Leq). After all ambient measurements have been taken; the pink noise will once again be turned on, with the limiter setting as discussed above in effect. The designated professional shall undertake a series of sound level measurements of the sound system at the same specified and agreed upon monitoring positions. Several Noise Indices will be recorded, but the index that will be used for the level of the sound system when testing compliance of the sound system with the DEC noise guideline shall be an A-weighted equivalent continuous level averaged over a minimum one minute period (Leq) or as long as necessary to legitimately measure the pink noise. If after performing the above procedure it becomes apparent that the recommended limiter setting based on Leq 85 dBA results in a sound system level greater than 5 dB above the ambient level at any particular agreed upon monitoring location, then the limiter will beSCHEDULE “C”reset to a lower level such that the least compliant of the monitoring positions will measure exactly 5 dB above ambient. Though a compliance level, as described above, has been selected in the context of amplified sound, PS21 agrees, as part of the commissioning process, to ensure that both amplified and unamplified sound do not exceed said compliance level.
Commissioning Procedure