Materials

Package: kwave.toolbox

Class for holding material property structures so that materials can be referenced using a single index. Used by the Medium class. Initialised with some default materials, but additional materials can be added. Each material structure within the Materials object must have at least the fields:

soundSpeed [m/s]
density [kg/m^3]

Optionally, a material may also have:

absorption coefficient prefactor (alpha0) [dB/cm/MHz^y]
absorption power law exponent (y)
nonlinearity parameter B/A (BonA)
specific heat capacity (C) [J/kg/K]
thermal conductivity (k_cond) [W/m/K]

Index handling:

The 'index' field is optional when adding a material.
If omitted, addMaterial auto-assigns the lowest free uint8 index in [0..255].
If provided, it must be a unique uint8-compatible integer in [0..255].

Examples materials = Materials(); T = materials.listMaterials() I = materials.listMaterialIndices() [materials, idx] = materials.addMaterial('softTissue', struct('soundSpeed',1540,'density',1000)); materials.addMaterial('softTissue', struct('index',10,'soundSpeed',1540,'density',1000));