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Be Quiety,
Be Your Standard.
Certification for outstanding floor noise reduction,
proven by AIoT all-unit measurement data.
QUIETY Standard measures every unit in a complex at each construction stage with Metainnotech's AIoT solution,
verifies the performance of the installed floor impact sound insulation structure,
and certifies complexes whose construction quality proves stable.
All units
Measured at every stage
First complex
Saejeol Doosan We've Trezium
3 grades
Expanding
Floor noise performance
you cannot see,
confirmed with data
Even with a certified insulation structure installed,
real performance can vary with site conditions.
QUIETY Standard tracks unit-level variation early through stage-by-stage measurement,
and manages complex-wide variation by measuring every unit.
Method 1
Stage-by-stage
- Track performance across slab, resilient layer and finishing mortar - Catch quality risk while construction is still under way - Build prevention into the process instead of reacting afterwards
Method 2
Every unit
- See the performance distribution of the whole complex, not a sample - Analyse unit-level variation and weak spots, not just the average - Earn external trust through full verification
View 1
For builders
Objectively prove floor noise construction quality, and secure a differentiating message and brand trust for sales and move-in.
View 2
For residents
Feel the complex's noise reduction performance, ease anxiety about the home, and gain a premium on asset value.
QUIETY certified complexes
Suwon Omokcheon The Live
All 201 units surveyed; every unit met the 49 dB threshold. Selected as an outstanding floor noise reduction complex.
SGC E&C, plaque ceremony Feb 2026
From application to certification, 6 steps
After a consultation and application on the official site, the QUIETY team reviews the complex and agrees the measurement scope and schedule.
Full on-site measurement follows with AIoT equipment, and the results are reviewed against the certification criteria.
- 1
Application
Complex details, unit count, construction stage
- 2
Measurement plan
Scope, schedule and on-site route agreed
- 3
On-site measurement
Performance data collected with AIoT equipment
- 4
Data analysis
Average, variation and risk zones quantified
- 5
Certification review
Criteria checked and selection made
- 6
Certification granted
Plaque awarded, promotion scope agreed and executed
A certification brand that distinguishes premium housing quality
QUIETY GREEN is currently being awarded; QUIETY BLUE and QUIETY PURPLE will follow.
Currently activeQUIETY GREEN
Complexes with verified floor noise reduction
Awarded to complexes whose all-unit floor structure performance is measured with AIoT data and meets the criteria.
- Quality verified on measured data
- Full all-unit measurement completed
- Certification, plaque and promotional assets
Coming soonQUIETY BLUE
Outstanding complexes with higher stability and quality control
Awarded to complexes proving upper-tier noise reduction and stable construction quality.
- Stricter criteria than GREEN
- Continuity of stage-by-stage quality control verified
- Premium brand promotional assets
Coming soonQUIETY PURPLE
Premium complexes with top performance and data reliability
The highest tier, combining top quality, data reliability and brand value.
- Industry-leading performance criteria
- Continuity of stage-by-stage quality control verified
- Premium brand promotional assets
Beyond the average —
a standard with no exceptions
A simple average represents the whole,
but can hide the noise one household suffers.
QUIETY Standard combines three indices at a 5:2:3 ratio
to answer the question residents really ask:
"will my home be quiet too?"
20%
Consistency Index
30%
Comfort Index
50%
Performance Index
Performance Index (PI) 50%
Definition
Purpose
Average single-number rating across all units Absolute noise reduction of the complex — lower is better
Comfort Index (SI) 30%
Definition
Purpose
Measured values of the bottom 10% of units Eases resident anxiety and focuses care on vulnerable unitsConsistency Index (CI) 20%
Definition
Purpose
Standard deviation of the measured values Manages unevenness in construction quality — smaller is better
Grades start at 70 out of 100 — GREEN 70–80 · BLUE 80–90 · PURPLE 90–100. (Detailed formulas and weighting are in the internal technical document; the site shows results only.)
Questions about certification?
Talk to a specialist and find out whether your complex qualifies. We reply within 1–2 business days.