Independently Tested. Fully Documented.

All major systems are tested at ARAI NABL-accredited acoustic laboratories, with reports available for consultant and authority verification.

0.90
Maximum NRC
(ASTM C-423)
38 dB
Sound Transmission
Class (STC)
36 dB
Weighted Rw
(ISO 717-1)
0.75
Weighted αw
(Class C)

Sound Absorption Report

Random-incidence absorption of a micro-perforated aluminium plate with paper-honeycomb core (total 105 mm), tested in a reverberation chamber.

  • NRC 0.90; weighted αw 0.75 (Class C)
  • Standards: ASTM C-423 & ISO 354
  • Build: 1 mm MPP aluminium + 100 mm honeycomb + 0.6 mm GI back
  • ARAI NABL-accredited laboratory, Apr 2025
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Sound Transmission Report

Airborne sound insulation of a composite double-skin micro-perforated panel, measured between reverberation chambers.

  • STC 38; weighted Rw 36 dB (C; Ctr: −1, −8)
  • Standards: ASTM E-90 / E-413 & ISO 717-1
  • Build: double MPP aluminium skins + honeycomb infill
  • ARAI NABL-accredited laboratory, Aug 2025
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Standards & Accreditation

Tested to International Standards

Standards Covered

  • ASTM C-423 / ISO 354 — sound absorption
  • ASTM E-90 / ISO 10140 — sound transmission
  • ISO 717-1 — STC & Rw ratings

NABL Accreditation

  • ISO/IEC 17025 compliant facility
  • Independent third-party verification
  • Internationally recognised methods

Report Availability

  • Sound absorption test data
  • Transmission-loss measurements
  • Material specifications for submittals

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