Struggling to interpret the numbers on an acoustic spec sheet? Whether you’re an architect, specifier, contractor or acoustician, this manufacturer’s technical guide cuts through the jargon and shows you exactly what Akupanel acoustic ratings mean—and why they matter for real rooms, not just lab tests.
In plain, practical terms you’ll learn how absorption ratings (NRC, SAA, αw and frequency-by-frequency coefficients) are measured, which testing standards to trust, and how mounting, finish and panel selection change real-world performance. We also include straightforward selection tips, common pitfalls, and quick reference examples so you can match the right Akupanel product to your project goals.
Read on to turn confusing numbers into confident design decisions and get the predictable acoustic results your clients expect.
Our brand name is ROOAOO
As the manufacturer of Akupanel products, ROOAOO provides technical data to help architects, acoustic consultants, and installers make informed decisions. Akupanel acoustic ratings summarize how an acoustic panel performs in absorbing, reflecting, or blocking sound. These ratings are not a single number that tells the whole story — they are a set of metrics measured under standardized conditions that must be interpreted in the context of mounting, panel construction, and the acoustic goals of the space.
Our short name is Rooaoo Acoustic Materials
Understanding Akupanel Acoustic Ratings
Common acoustic rating metrics you will encounter on Akupanel datasheets include NRC (Noise Reduction Coefficient), SAA (Sound Absorption Average), and frequency-dependent absorption coefficients (e.g., alpha values at 125 Hz–4000 Hz). NRC is a convenient single-number average of absorption at 250, 500, 1000, and 2000 Hz (per ASTM C423) and ranges from 0 (total reflection) to 1.0 (perfect absorption). SAA is similar but uses a larger set of one-third octave bands (typically 200–2500 Hz) for a slightly more representative average.
In addition to absorption metrics, you may see Sabins (acoustic absorption area) which convert absorption coefficients into equivalent absorption area for a panel of given size, and STC (Sound Transmission Class) numbers for partition or panel systems tested under ASTM E90 and rated with ISO/ASTM methods. STC characterizes airborne sound transmission loss, which is a different property than surface absorption.
Test Standards, Metrics, and What They Mean
Akupanel ratings should always cite the test standard and mounting condition. The most common standards are:
- ASTM C423 / ISO 10534-2: measures absorption coefficients in a reverberation room. Mounting types (Type A — directly mounted, Type E — with edge gaps, Type B — baffled with air cavity) heavily influence low-frequency performance.
- ISO 354:Intl. standard for reverberation room absorption testing.
- ASTM E90 / ISO 10140: measures transmission loss for STC ratings.
Because absorption is frequency dependent, a panel may have excellent mid-high frequency absorption but modest performance below 250 Hz unless a deeper air cavity, thicker core, or tuned resonant elements are added. Typical performance trends for Akupanel variants:
- Thin, solid-faced panels (6–12 mm) without cavity: low bass absorption, moderate mid/high absorption (NRC ~0.2–0.6 typical).
- Perforated or micro-perforated panels with absorptive backing or cavity: improved mid-bass and mid frequencies (NRC ~0.6–1.0 possible depending on cavity depth and core).
- Multi-layer or composite panels with mineral wool/fiberglass cores: higher broadband absorption and greater low-frequency performance.
Factors Affecting Akupanel Performance
Several practical variables alter lab ratings in-situ:
- Mounting depth: Increasing the air cavity behind the panel shifts absorption to lower frequencies and typically increases overall NRC/SAA.
- Edge treatment and room boundaries: Panels placed near corners or ceilings interact with room modes; corner placement often increases low-frequency absorption effectiveness.
- Surface finish and perforation: Perforation pattern, open area percentage, and backing material determine whether the panel functions as a membrane absorber, a perforated absorber, or a porous absorber.
- Temperature and humidity: Extreme environments can change porous core acoustic behavior, especially when moisture is present.
- Installation quality: Gaps, flanking paths, and poor sealing will degrade both absorption and transmission loss performance.
Specifying and Installing Akupanel for Real-World Performance
When specifying Akupanel from ROOAOO, request the full test report that includes frequency-by-frequency absorption coefficients and details of the test mounting. For projects requiring background noise control and short reverberation times (e.g., classrooms, open-plan offices), prioritize panels with demonstrated mid-frequency absorption and allow for appropriate coverage ratio across the room. For low-frequency control, specify panels with thicker cores, deeper cavities, or coupled bass-trapping elements.
Installation best practices:
- Follow ROOAOO installation guides to maintain test conditions in practice (e.g., recommended cavity depth, fixing pattern).
- Avoid isolated small panel areas if possible — acoustic benefit is proportional to total absorptive area and placement.
- Use sealing and gaskets where transmission loss is required — surface absorption does not equate to partition airtightness.
Akupanel acoustic ratings are powerful tools when understood correctly. ROOAOO (Rooaoo Acoustic Materials) encourages specifiers to review full reports rather than rely on single-number claims, confirm mounting conditions, and consider the specific acoustic objectives of each space. With careful selection and proper installation, Akupanel products deliver predictable, measurable improvements in room acoustics across a wide range of applications.
Understanding Akupanel acoustic ratings gives you the language and metrics to choose the right product for any space—whether you’re chasing speech clarity, privacy, or ambient comfort. Backed by 40 years of industry experience, our approach combines rigorous testing, real-world performance data, and practical installation guidance so architects, contractors and end-users can specify with confidence. If you still have questions about NRC, STC, absorption coefficients or how a particular Akupanel will perform in your project, our technical team is ready to help with samples, calculations and site-specific advice. Trust four decades of innovation and service to turn acoustic data into quieter, healthier, better-sounding spaces.
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