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Acoustic performance

EQ10 | Possible point

GBCI Reviewer Tip

Common issue: Trouble following the Background Noise methodology outlined in 2007 ASHRAE HVAC Handbook Chp 47 pgs 47.26-47.30 Indoor Sound Criteria.

Suggestions: Utilize Path 2 to comply with Background Noise, which is a narrative option outlined in ANSI S12.60-2002 Annex B.

Common issue: For Reverberation Time calculations, proprietary spreadsheets are convenient, but often do not seem to allow input for surfaces other than those covered with the acoustic products.

Suggestions: If the core learning/classroom space is less than 10,000 cubic feet, utilize the much simpler Case 1: Path 1 (Minimum NRC). Alternatively, when pursuing Case 1: Path 2, or Case 2: Path 1, utilize the calculation table within the LEED form (which is based on the calculation methodology outlined in ANSI S12.60-02 Annex C) instead of the proprietary spreadsheet, and ensure that all six surfaces (four walls, floor, and ceiling) are entered in the form. This may produce a more accurate and lower reverberation time.

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