Acoustic Barrier Attenuation: metal_panel
Sound barrier insertion loss and noise reduction data for highway, industrial, and residential acoustic barriers — concrete, masonry, earth berm, metal, timber, acrylic, absorptive, jersey barrier, and composite types. Includes STC rating, octave-band transmission loss (125–4000 Hz), insertion loss at Fresnel numbers 5 and 10, NRC, lifespan, and installed cost per FHWA-HEP-10-025, ISO 9613-2, and Bies & Hansen Engineering Noise Control.
| barrier type | material | Fresnel number method | NRC absorptive side (dimensionless) | STC rating (dimensionless) | TL 1000Hz dB (dB) | TL 125Hz dB (dB) | TL 2000Hz dB (dB) | TL 250Hz dB (dB) | TL 4000Hz dB (dB) | TL 500Hz dB (dB) | barrier height ft (ft) | cost per sf installed (USD/sf) | expected lifespan years (years) | insertion loss dB at 10dB Fresnel (dB) | insertion loss dB at 5dB Fresnel (dB) | surface density lb per ft2 (lb/ft2) | weather resistance |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| metal_panel | Aluminum absorptive panel (dual-skin; filled mineral wool) | yes | 0.75 | 38 | 38 | 26 | 40 | 31 | 42 | 35 | 10 | 45 | 40 | 10 | 5 | 8 | good |
| metal_panel | Galvanized steel absorptive barrier (dual-skin; rock wool; NRC 0.80) | yes | 0.8 | 40 | 40 | 26 | 42 | 31 | 44 | 36 | 10 | 55 | 35 | 10 | 5 | 10 | good |
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