Table 1 Acoustic properties of anatomical groups used as input data in OptimUS calculations
From: Evaluation of fetal exposure to environmental noise using a computer-generated model
Anatomical group | Speed of sound (m·s−1) | Material density (kg·m−3) | Attenuation coefficient (Np·m−1 at 1 MHz) | Attenuation power law |
|---|---|---|---|---|
Abdominal tissue | 1489 | 950 | 0.1 | 1 |
Spine bone | 4020 | 2700 | 0.2 | 1 |
Uterine tissue | 1500 | 1000 | 585.3 | 1 |
Amniotic fluid | 1500 | 1000 | 15·10−3 | 2 |
