When shopping for a soundproof pod, you’ll inevitably encounter a wall of specifications. One of the most important — and most misunderstood — is the ISO 23351-1:2020 standard. Understanding what this standard actually measures can be the difference between buying a functional acoustic solution and an expensive box that doesn’t deliver.
What Is ISO 23351-1:2020?
Published in 2020, ISO 23351-1 is the international standard specifically designed for measuring the acoustic performance of furniture and enclosures intended for speech privacy. It tests how well a structure reduces the sound level of human speech across the critical frequency range of 125 to 8000 Hz.
This range matters because it covers almost everything the human ear processes in an office environment — from the low rumble of HVAC systems to the highest frequencies of a speakerphone.
What the Numbers Actually Mean
Let’s cut through the marketing. When a manufacturer claims “45dB ± 5dB soundproofing,” here’s what that translates to in real life:
| Inside Pod Level |
Outside Measured Level |
Perceived Experience |
| 70dB (normal conversation) |
30–35dB (whisper level) |
Normal speech becomes nearly inaudible |
| 80dB (enthusiastic call) |
35–40dB (library level) |
Only faint sound detectable |
| 65dB (soft meeting) |
20–25dB (barely audible) |
Complete speech privacy |
With INYKO Silent Pod achieving a maximum of 48dB sound isolation under ISO 23351-1:2020 testing, the result is what acoustic engineers call a “sound island” — a space where your conversation stays contained, and outside noise stays outside.
Why Certification Matters
Not all ISO claims are equal. Many products use generic “soundproof” labels without third-party verification. True confidence comes from testing by accredited laboratories using the correct methodology.
INYKO Silent Pod’s acoustic performance has been independently verified by SGS — one of the world’s leading inspection, verification, testing and certification companies — strictly following ISO 23351-1:2020 protocols. Additionally, the factory holds SGS and TÜV dual certification, providing end-to-end quality assurance from raw material to finished product.
The Industry Collaboration Advantage
Beyond certification, INYKO has established a deep collaboration with the SGS South China University of Technology Acoustic Laboratory. This academic partnership means every structural optimization is backed by peer-reviewed acoustic engineering, not just marketing claims.
Joint development with top acoustic experts allows for continuous improvement in:
- Material density and layering optimization
- Cavity resonance tuning for specific frequency bands
- Seal integrity improvements at door and glass interfaces
What to Look for When Buying
When evaluating a soundproof pod, don’t just look at the peak decibel number. Ask:
- What standard was used for testing? (ISO 23351-1:2020 is the right one)
- What frequency range was tested? (125–8000Hz is the full range)
- Who conducted the test? (Third-party certification from SGS or TÜV is ideal)
- What’s the nominal vs. peak value? (45dB±5dB nominal with 48dB peak is excellent)
- Is the factory itself certified? (Dual SGS+TUV certification indicates consistent quality)
The Bottom Line
A soundproof pod is a significant investment. Understanding the acoustic standard behind the numbers ensures you’re paying for proven performance rather than marketing hype. INYKO Silent Pod’s independently verified ISO 23351-1:2020 testing gives you the confidence that the pod you install delivers the quiet you’re paying for.
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