Sound Insulation Performance - One of the Five Key Characteristics of System Windows & Doors

Sound Insulation Performance

Home is our haven – a place to unwind in serene comfort. For optimal relaxation:

Daytime noise: ≤40 dB (comparable to a quiet office)

Nighttime noise: ≤30 dB (whisper-quiet for sleep)
Note: While Jiangsu standards lack mandatory requirements, these are ideal thresholds for wellbeing.

The Science of Soundproofing
Noise travels via:

Airborne transmission (e.g., voices, traffic) – Blocked by airtight seals

Structure-borne vibration (e.g., subway rumble) – Requires mass-damping solutions

Key Strategies by Noise Type
For Mid/High-Frequency Noise
(e.g., speech, birdsong, school bells)
✅ Multi-pane insulated glass:

Example: 6mm + 12mm air + 6mm configuration (blocks ~35 dB)

Mechanism: Air gaps disrupt sound wave propagation

For Low-Frequency Noise
(e.g., trucks, airplanes, construction)
✅ Laminated glass:

1.52mm PVB interlayer absorbs vibrations (critical for <250Hz noise)

Example: 6mm glass + 1.52mm PVB + 6mm glass (reduces bass by 5-10dB vs. standard glass)

Realistic Expectations
Cost vs. Performance: Beyond 40 dB noise reduction, each additional decibel requires exponentially more investment

Holistic Approach: Combine with:

Airtight frames (EPDM gaskets)

Mass-loaded barriers in walls

Resilient window mounts to decouple vibrations

Case Study:
A Nanjing apartment near a subway line used:
✔ 6mm laminated + 16mm air + 6mm laminated
✔ Triple EPDM seals
Result: Nighttime indoor noise reduced from 42 dB to 28 dB