Table 4 Transmitted acoustic pressure levels for the reference and the proposed models.
From: Investigation of acoustic waves behavior of an underground tunnel in a multilayer soil
Concrete type | Transmitted acoustic pressure level (dB) | |
|---|---|---|
Reference model32 | Proposed model | |
Concrete I | 163.90 | 164.92 |
Concrete II | 164.10 | 164.93 |
Concrete III | 164.20 | 165.04 |
