Instrument
INS-09
Revision
r0.2 · pre-alpha
Status
In development
Target release
Q4 2026
Acoustic Underlay Comparison
Comparative analysis of acoustic underlays against BCA / NCC impact and airborne targets for multi-residential and hotel applications.
Ensures underlay selection satisfies acoustic report requirements without over-specifying at commercial cost.
Preview interface · not yet operational
beta://library/acoustic-underlay
INS-09 · r0.2 · pre-alpha
Input parameters
Application
Multi-residential — apartmentLocked
Slab type
150mm PT concreteLocked
Target Ln,w + Ci
dB
≤ 50Locked
Target Rw + Ctr
dB
≥ 50Locked
Floor finish
Engineered timber 15mmLocked
Compliant shortlist · target Ln,w+Ci ≤ 50 dB
| Underlay | ΔLw (dB) | Comp. set | Life (yrs) |
|---|---|---|---|
| UL-A · rubber 3mm | 22 | 0.14 | 25 |
| UL-B · cross-linked PE 2mm | 19 | 0.08 | 20 |
| UL-C · felt composite 5mm | 26 | 0.22 | 25 |
Output register
01
Compliant underlay shortlist
Awaiting · release
02
ΔLw contribution (dB)
Awaiting · release
03
Compression set (%)
Awaiting · release
04
Warranted service life
Awaiting · release
Session · read-only · logged
Acoustic performance
Planned capability
- 01Overlay against project acoustic report.
- 02Cost-per-dB efficiency ranking.
- 03Integration with adhesive & product warranty matrix.