HDB Soundproofing: Measuring Decibel Reduction After Installation (metrics)

HDB Soundproofing: Measuring Decibel Reduction After Installation (metrics)

Frequently Asked Questions

Common metrics include the Noise Reduction Coefficient (NRC), Sound Transmission Class (STC), and Impact Insulation Class (IIC). These ratings indicate how well a material or system reduces airborne and impact noise.
For effective soundproofing in an HDB flat, aim for an STC rating of 50 or higher. This level of rating will significantly reduce the transmission of speech and other common household noises.
NRC measures how well a material absorbs sound. A higher NRC indicates better sound absorption, reducing echo and reverberation within a room, which contributes to overall soundproofing effectiveness.
IIC measures how well a floor assembly reduces impact noise, such as footsteps or dropped objects, from traveling to the room below. Its particularly important for multi-story HDB flats.
Soundproofing materials and installations should ideally be tested in certified acoustic laboratories. Ask your soundproofing contractor for test reports and certifications to verify the performance claims of their solutions.