Technical Data - dBNR Nois-eNvelope™ A4L Panel

dBNR Nois-eNvelope™ A4L architectural and environmental acoustic panels are designed by our team of experts in acoustics and noise control applications to achieve outstanding performance acoustics. The A4L Panels can be used to create a noise barrier system or assembled into a noise control enclosure system depending on the location of the noise source with regards to the receiver and the noise reduction criteria.

Our team works hard to determine the appropriate acoustic system that will provide superior noise reduction with industry-leading results for both the Noise Reduction Coefficient (NRC) and Sound Transmission Class (STC) ratings. dBNR Nois-eNvelope A4L Panel has a Noise Reduction Coefficient rating of 1.10 and Sound Transmission Class 39.


Galvanized construction, pre-painted steel, stainless steels and aluminum

Panel Thicknesses:
4.00 in. (101.60 mm)

Panel Dimensions:
48 in.(1.21m) wide by up to 288 in.(7.31m) long

18 ga up to 10 ga exterior with 22 ga up to 18 ga perforated interior finish

Paint finishes:
Galvanized and custom painted finishes available

dBNR Nois-eNvelope™ A4L Panel

Octave Ctr Frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Sound Absorption Coefficient NRC
0.25 0.91 1.08 1.11 1.09 1.07 1.05 1.15
Transmission Loss (TL) STC
11 20 26 41 53 56 62 60

Tests conducted by Riverbank Acoustical Laboratories

Sound Absorption
dBNR Nois-eNvelope™ Panel A4L


Sound Transmission
dBNR Nois-eNvelope™ Panel A4L


For more detailed information on dBNR Nois-eNvelope™ architectural and environmental acoustic A4L panels please visit our test data reports.

Please refer to Tiger's Drylac Power Coatings guide for details on our powder coating offerings.

Servicing clients in the US, Canada, Mexico, and many international locations worldwide.

dB Noise Reduction | 877-744-8601 | 519-651-3330 | © 2018 All Rights Reserved