holab.materials
This module provides a framework for representing acoustic materials used in simulations or experiments.
It includes classes that capture key physical properties of materials such as sound speed, density, and attenuation coefficient. Two main classes are provided: Material and its derived PowerLawAttenuation.
The module also comes with a pre-defined library of materials like Agilus30, VeroClear, and water.
agilus30 = PowerLawAttenuation('Agilus30', _vero_agiuls_paper, 2034.9, 1180.0, 9.109, y=1.017)
module-attribute
Agilus30 material from Stratasys. The attenuation coefficient is measured from 1 to 3.5 MHz.
veroclear = PowerLawAttenuation('VeroClear', _vero_agiuls_paper, 2474.5, 1128.0, 3.696, y=0.9958)
module-attribute
VeroClear material from Stratasys. The attenuation coefficient is measured from 1 to 3.5 MHz.
water = Material('water', '', 1480.0, 1000.0, 0.0)
module-attribute
Water at 20°C. Note that the attenuation coefficient is 0.
Material
The generic interface for representing an acoustic material. The material is defined by its sound speed, density and attenuation coefficient.
Attributes:
| Name | Type | Description |
|---|---|---|
name |
str
|
The name of the material. |
reference |
str
|
The bibliographic reference for the measured values. |
sound_speed |
float
|
The sound speed of the material. |
density |
float
|
The density of the material. |
attenuation |
float
|
The attenuation coefficient of the material. |
as_medium(domain, f0=1.0)
Returns the material as a jwave Medium object.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
domain |
Domain
|
The domain of the medium. |
required |
f0 |
float
|
The frequency at which the material is used. This is because the attenuation coefficient is frequency-dependent, and jwave uses a y=2 attenuation model (Stokes attenuation), so we need to make sure that the attenuation coefficient is correctly scaled for the frequency of interest. |
1.0
|
Returns:
| Name | Type | Description |
|---|---|---|
Medium |
Medium
|
The material as a jwave Medium object. |
PowerLawAttenuation
Bases: Material
A material with a power law attenuation coefficient.
__init__(name, reference, sound_speed, density, attenuation, y)
Initialize a material with a power law attenuation coefficient.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
name |
str
|
The name of the material. |
required |
reference |
str
|
The bibliographic reference for the measured values. |
required |
sound_speed |
float
|
The sound speed of the material in $m/s$. |
required |
density |
float
|
The density of the material in $kg/m^3$. |
required |
attenuation |
float
|
The attenuation coefficient of the material in $dB/cm/MHz$. |
required |
y |
float
|
The exponent of the power law. |
required |