Acoustic Wall Trade Resource

NRC Test Report — Printed Acoustical Panels

Independent NRC test report for OrangePiel printed acoustical panels per ASTM C423 (ASTM International). Tested in reverberation chamber at four 1/3-octave bands (250, 500, 1000, 2000 Hz). Signed lab report PDF + raw absorption coefficient data table. At a glance — NRC 0.85 across all standard fabric finishes, tested per ASTM C423 reverberation-chamber method. Test panel: 1 inch (25 mm) thickness, Type A mounting (direct to chamber wall). Lab: independent NVLAP-accredited acoustics laboratory. Sound absorption coefficient data per measured frequency band: 250 Hz = 0.62, 500 Hz = 0.94, 1000 Hz = 0.96, 2000 Hz = 0.93. NRC averaged at 0.85 (rounded to nearest 0.05). Means an OrangePiel acoustic panel absorbs 85 percent of the sound energy that strikes it across the measured band. NRC value framing for specifiers: 0.00-0.20 reflective (concrete, glass, painted gypsum); 0.20-0.50 mildly absorptive (carpet, upholstered furniture); 0.50-0.70 moderately absorptive (average acoustic ceiling tile); 0.70-0.90 absorptive (specifier-grade — OrangePiel range); 0.90-1.00 highly absorptive (broadband studio treatment). Companion certifications on file in the same trade portal: ASTM E84 Class A (FSI ≤ 25, SDI ≤ 450) for surface burning; NFPA 701 (2023 ed.) for fabric flame propagation; UL GREENGUARD Gold for low-VOC indoor air quality; AATCC 16.3 for colorfastness to xenon-arc light; California Cal. Code Regs. Title 19 §3.08 for assembly-occupancy compliance; IBC Chapter 8 for commercial-occupancy interior finish approval. Drop into a CSI 3-part spec at Section 09 84 00 (Acoustical Room Components): Part 1 General → 1.05 Submittals as "Acoustical Test Reports per ASTM C423 — submit before delivery"; Part 2 Products → 2.02 Performance Requirements as "Sound Absorption: NRC 0.85 minimum per ASTM C423"; Part 3 Execution → 3.04 Field Quality Control optional "RT60 verification post-install per ASTM E2235 (when specified)". Manufactured in Richmond, Virginia since 2006. Installed by OrangePiel craftsmen for large client projects nationwide.