Full Aluminum Acoustic Panel

A: A full aluminum acoustic panel is a sound-absorbing architectural panel engineered to reduce noise and control reverberation in interior spaces. It consists of an aluminum face sheet with precision micro-perforations (0.5–3.0mm diameter holes, 1–25% open area), backed by an acoustic fleece or non-woven sound-absorbing membrane, bonded to an aluminum honeycomb core with a solid aluminum back sheet. Sound waves enter through the micro-perforations, pass through the acoustic fleece where sound energy is converted to heat through viscous friction, and are dampened inside the honeycomb cells which act as individual Helmholtz resonators. This multi-layer acoustic system delivers a Noise Reduction Coefficient (NRC) of 0.65–0.95 depending on the configuration, while maintaining a perfectly flat, rigid panel suitable for walls, ceilings, and partitions. The panel is 100% metal (no mineral wool, fiberglass, or organic foams), making it fire-safe, moisture-resistant, fiber-free, and fully recyclable - ideal for projects where traditional porous absorbers (fiberglass, rockwool, PET felt) are unsuitable due to fire, hygiene, or durability requirements.

A: Common specifications:
• Total panel thickness: 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 50mm, 100mm
• Face sheet: 0.8mm, 1.0mm, 1.2mm, 1.5mm aluminum (3003/5052 alloy)
• Perforation parameters:
- Hole diameter: 0.5mm, 0.8mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm
- Hole pitch (center-to-center): 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm
- Perforation pattern: staggered (60°), straight (90°), or custom
- Open area ratio: 1%, 2%, 5%, 8%, 10%, 15%, 20%, 25%
• Acoustic fleece: black non-woven polyester or glass-fiber tissue, 0.2–0.5mm thick, airflow resistance 200–1,500 Pa·s/m
• Honeycomb core: aluminum, cell size 6mm/8mm/12mm, density 40–80 kg/m³
• Back sheet: 0.5–1.0mm solid aluminum (no perforations)
• Standard panel size: 600×600mm, 600×1200mm, 1200×1200mm, 1200×2400mm, 1200×3000mm
• Weight: 5–15 kg/m² depending on thickness
• Acoustic performance: NRC 0.65–0.95 (tested per ASTM C423 / ISO 354 / GB/T 20247)
• Surface finishes: powder coating, PVDF, anodizing, wood-grain transfer (perforations remain visible)

A: Standard perforation patterns and finishes: MOQ is 100–200 square meters per pattern/size/color combination. Custom perforation patterns (non-standard hole diameter, pitch, or open area ratio) may require 200–400 m². Small evaluation orders (30–50 m²) can be accommodated at sample pricing. The MOQ is driven by the CNC perforation setup, acoustic fleece lamination, and surface treatment line minimums. For projects requiring specific acoustic performance targets (NRC, sound absorption curve), we recommend sharing your acoustic consultant's specification so we can match the perforation and fleece parameters precisely. Please provide the panel size, thickness, perforation preference, and target NRC for a tailored quotation.

A: Key applications across sectors with strict acoustic, fire, and hygiene requirements:
• Transport hubs:
- Metro/subway station ceilings and wall panels - Class A fire, high durability, graffiti-resistant
- Airport terminal wall cladding and ceiling baffles - fiber-free for air quality, large-format possible
- Railway station waiting halls and platform canopies
• Commercial & public buildings:
- Open-plan office acoustic ceiling tiles and wall absorbers
- Conference rooms and boardrooms - tuned absorption for speech clarity
- Auditoriums, lecture halls, and theaters - adjustable acoustic performance via perforation tuning
- Hotel lobbies and atriums - controlling reverberation in large-volume spaces
• Industrial & infrastructure:
- Tunnel acoustic lining panels (road and rail tunnels) - fireproof, washable, impact-resistant
- Factory and plant noise control enclosures - durable in harsh environments
- Power generation and HVAC equipment acoustic enclosures
• Healthcare & laboratories:
- Hospital corridor wall protection with acoustic absorption
- Cleanroom wall and ceiling panels - fiber-free, sterilizable
- MRI and medical equipment rooms - non-magnetic aluminum
• Education:
- Classroom and library acoustic wall and ceiling panels
- Sports hall and swimming pool acoustic ceilings - moisture-proof
• Marine & offshore:
- Ship cabin and corridor acoustic panels - meeting IMO noise and fire codes
- Offshore platform accommodation module interiors

A: The full aluminum acoustic panel uses a micro-perforated panel (MPP) absorber principle, first developed by Professor Dah-You Maa, combined with the additional damping of the honeycomb core:
Step 1 - Sound wave entry: Sound waves strike the perforated face sheet and pass through the micro-holes (typically 0.5–1.5mm diameter).
Step 2 - Acoustic fleece damping: The sound waves then pass through the thin acoustic fleece layer immediately behind the perforated sheet. The fleece creates viscous friction - air particles moving through the fibrous layer lose kinetic energy, which is converted to a negligible amount of heat. This is the primary sound absorption mechanism.
Step 3 - Honeycomb cavity resonance: Each honeycomb cell (6–12mm) acts as a small Helmholtz resonator. The perforation is the "neck" and the cell volume is the "cavity." Air inside the cell acts as a spring; the air plug in the perforation acts as a mass. This mass-spring system has a natural resonant frequency at which absorption peaks. By tuning the perforation diameter, open area ratio, and cavity depth (panel thickness), we can shift the absorption peak to target specific frequencies.
Step 4 - Solid back: The solid aluminum back sheet reflects unabsorbed sound back through the honeycomb cells, giving it a second pass through the acoustic fleece for additional absorption.
Frequency tuning:
• Smaller holes (0.5–0.8mm) and lower open area (1–3%): shift absorption peak to lower frequencies (250–500 Hz) - good for controlling bass and speech rumble
• Larger holes (1.5–3.0mm) and higher open area (5–15%): broader mid-frequency absorption (500–2000 Hz) - good for general reverberation control
• Deeper cavity (50–100mm panel thickness): extends absorption into low frequencies (125–250 Hz)
• Multiple cavity depths in one space: broadens the overall absorption bandwidth
We can provide acoustic test reports (absorption coefficient per 1/3 octave band) for our standard configurations, and work with your acoustic consultant to develop custom parameters.

A: Compared to fiberglass / mineral wool acoustic panels:
① Fiber-free: no airborne fibers - safe for occupied spaces without encapsulation; no respiratory irritation during installation or service life
② Non-hygroscopic: no moisture absorption - no mold growth, no sagging in humid environments; suitable for swimming pools, basements, and tropical climates
③ Fire-safe: Class A non-combustible (GB 8624) / A1 (EN 13501-1); mineral wool requires foil facing or encapsulation to achieve A2, and organic binders can smolder
④ Washable surface: the perforated aluminum face can be cleaned with water, steam, or mild disinfectants - fiberglass panels degrade when wet
⑤ No encapsulation required: fiberglass needs acoustic fabric wrapping and edge treatment; aluminum acoustic panels are ready to install
⑥ Longer service life: 30+ years without sagging, crumbling, or performance degradation; fiberglass panels typically 10–15 years
⑦ High impact resistance: suitable for high-traffic and vandal-prone areas (corridors, tunnels, sports halls)
Compared to PET felt / polyester acoustic panels:
① Fire rating: Class A vs. Class B/C for PET felt - not suitable for public buildings under strict fire codes
② No plasticizer or VOC emissions: PET felt can off-gas over time, especially in warm environments
③ Higher rigidity: aluminum acoustic panels can span larger distances without sagging
④ Better low-frequency absorption potential (with deeper cavities)
Compared to perforated gypsum / plasterboard:
① Lighter weight: ~5–12 kg/m² vs. 20–30 kg/m² - easier handling and reduced structural load
② Waterproof: gypsum crumbles when wet
③ Flatter surface: aluminum honeycomb panels maintain perfect flatness; gypsum can sag over large spans
④ No on-site painting: factory-finished surface

A: The surface finish is applied AFTER perforation, so the hole edges are coated as well for corrosion protection and visual consistency:
• Powder coating: matte, satin, or textured finish; 300+ RAL colors; most cost-effective and widely used. The coating does not clog perforations when properly applied.
• PVDF (Fluorocarbon): premium exterior-grade coating with 25+ year durability; for outdoor and semi-outdoor acoustic applications (transport hubs, open-air structures)
• Anodizing: natural, bronze, or black metallic finish; hard anodized for extreme durability. The anodic layer forms uniformly inside perforations as well.
• Wood-grain heat transfer: realistic timber patterns applied to the perforated face - combines the warmth of wood aesthetics with acoustic performance and fire safety. Perforations remain clearly visible.
• Brushed finish: linear satin grain texture with clear anodized or lacquer seal.
• Custom print / graphic acoustic panels: company logos, artistic patterns, or architectural graphics digitally printed on the acoustic face - the image is uninterrupted while perforations provide acoustic function.
Installation tip: The visual appearance of perforations changes with viewing distance and lighting angle. We recommend ordering a sample panel in your chosen finish, perforation pattern, and color to evaluate under your project's actual lighting conditions before full production.

A: Yes. The panel is 100% metal (aluminum skins, aluminum honeycomb core) and is rated Class A non-combustible (GB 8624) / Class A1 (EN 13501-1). The acoustic fleece layer: for standard polyester fleece, the panel maintains Class A2 (due to the minimal organic content in the thin fleece); for glass-fiber tissue, the panel achieves full Class A1. For projects requiring the strictest fire ratings (high-rise, transport tunnels, marine), specify the glass-fiber tissue option and brazed bonding. Third-party fire test reports per GB 8624, EN 13501-1, ASTM E84, and IMO FTP Code are available. Note: the acoustic absorption performance is essentially identical between the two fleece types; the choice is driven by fire-rating requirements.

A: • Standard perforation patterns, stock finishes, 15–20mm thickness: 10–15 working days
• Standard pattern, custom color/finish: 15–20 working days
• Custom perforation pattern (non-standard hole diameter/pitch): 20–25 working days (includes CNC programming and sample perforation)
• Custom graphic print acoustic panels: 20–28 working days (includes artwork proofing and test print)
• Acoustic fleece with specific airflow resistance specification: add 5–7 days for material procurement
• Large project orders: schedule confirmed upon PO review; phased delivery available
Acoustic performance verification:
• For standard configurations, existing lab test reports are available immediately
• For custom configurations requiring new acoustic testing: add 10–15 working days (reverberation room or impedance tube test per project specification)
We recommend placing orders 6–8 weeks before required on-site delivery, especially for custom acoustic configurations requiring testing. Sample panels (300×300mm or 600×600mm) with your specified perforation and finish can be dispatched in 5–7 days.

A: Packaging:
• Each panel protected with 50μm PE protective film on the perforated face and solid back
• Panels stacked face-to-face with 3mm PE foam interleaving
• Stack enclosed with 5mm plywood cover boards top and bottom; secured with PET straps
• All corners and edges protected with heavy-duty cardboard angle guards
• Acoustic fleece is protected inside the panel and does not require additional packaging
Shipping:
• Domestic: dedicated trucking with air-ride suspension
• International: FCL 20GP/40HQ sea freight; CIF/FOB standard; DDP for select markets
• Sample shipping: via DHL/FedEx/UPS in plywood-reinforced packaging
Installation systems:
• T-bar suspended ceiling grid: panels sized to 600×600mm or 600×1200mm modules; drop into standard 15mm or 24mm T-bar grid (tegular edge available for reveal effect)
• Concealed clip / torsion spring system: for seamless acoustic ceilings with no visible grid
• Wall-mounted Z-clip or hat-channel system: interlocking aluminum profiles for wall applications
• Direct adhesive bonding: on flat substrates (concrete, plasterboard); use MS polymer adhesive
• Cable suspension: for acoustic baffles and clouds; stainless steel cable with gripper fittings
• Frame mounting: aluminum perimeter trim frame for wall panel systems
Important installation notes:
• Do not paint over perforations - this will reduce or eliminate acoustic performance
• Ensure the acoustic fleece is intact and properly positioned behind perforations before installation
• For ceiling installations, confirm the grid system can support the panel weight (5–15 kg/m² typically well within standard T-bar capacity)
• Handle panels with clean gloves to avoid soiling the acoustic fleece through perforations