PyAbsorp is a python module that has the main focus to help estimate the Sound Absorption Coefficient.

Related tags

Audiopythonsoundacousticsallardabsorptioncoefficientrayleighjohnson-champouxbiot-allarddelany-bazleyabsorption-models
Overview

GitHub release GitHub last commit GitHub issues LICENSE

PyAbsorp logo

This is a package developed to be use to find the Sound Absorption Coefficient through some implemented models, like Biot-Allard, Johnson-Champoux and others. This project is in alpha stage.

Dependencies

PyAbsorp runs under Linux, Windows and MacOS, a Python 3.8.10 installation is needed with the latest Numpy (1.20.3 or higher), Scipy (1.6.3 or higher). Matplotlib is recommended, but not necessary.

Implemented Models

  • Delany-Bazley (with Miki and Allard-Champoux variation)
  • Biot-Allard
  • Johnson-Champoux (with Allard and Lafarge variation)
  • Rayleigh

How to Install

  1. First make sure that you have the package setuptools installed.
  2. Install through pip, by using the following command: pip install git+https://github.com/Toktom/PyAbsorp

Future Objectives

  • More analytic models (Wilson and others).
  • Code validation.
  • Implementation of absorbers models.
  • Theoretical review of the implemented models.
  • English review.

How to contribute

For more details, read the CONTRIBUTING file.

License

This project is under MIT License. Check the license here.

Authors

Contributors

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Comments
  • Calculate absorption from different frequencies with the same material

    Calculate absorption from different frequencies with the same material

    I've just changed a few lines on the Material class, that no longer requires an array of frequency values to be instantiated. The frequencies are now passed as an argument of the estimate_absorption method, then it is stored for further referencing.

    This allows better coupling with other empirical, analytical and numerical models, since different methods might need a different range of frequencies.

    opened by Chum4k3r 0
  • Improved API

    Improved API

    I've been watching your development for a while now and it is really impressive!

    As my contribution to your wonderful package, I've developed two classes that may help on code modularization and reuse.

    The AirProperties class is a simple interface to the air_properties function, that can have values reset and recalculate its own properties.

    The Material class is an abstraction of a single material being studied, it holds physical information such as its thickness, porosity, tortuosity, etc, and also a reference to air properties and an array of frequencies to be modelled against.

    The great trick here is the estimate_absorption method, which take a simple string with the absorption model name (e.g. "biot-allard" for Biot-Allard model), or even easier, only the model initials (e.g. "db" for Delany-Bazley model).

    It also allows the use of model variations, such as the "allard" or "lafarge" versions of the Johnson-Champoux model by passing the corresponding string argument to the var parameter.

    I've taken the care to document the most of it and work on two example codes that does the same job as the example_johnson_champoux.py code.

    Feel free to question or to make any suggestions. Stay safe, wear mask and keep coding :D

    opened by Chum4k3r 0
  • Johnson-Champoux-Allard-Pride-Lafarge Model Implementation

    Johnson-Champoux-Allard-Pride-Lafarge Model Implementation

    I was trying to implement the Johnson-Champoux-Allard-Pride-Lafarge model, but I'm stuck because I didn't understand how to obtain the Static Viscous Tortuosity and the Static Thermal Tortuosity required in the mathematical formulation. I did some research and I dind't find anything that could help me. I looked into the book Propagation of Sound in Porous Media by Jean F. Allard and Noureddine Atalla but the explanation about Static Viscous Tortuosity it's pretty short and a bit abstract to comprehend, and I didn't find anything around Static Thermal Tortuosity. I was following the version of the mathematical formulation presented in the website APMR (Acoustical Porous Material Recipes). If someone has any suggestion to how I figure it this problem out, please contact me.

    enhancement help wanted 
    opened by Toktom 1
  • Code validation

    Code validation

    Hello I'm Michael the developer of this small project that is just the implementation of some of the models that are use to find the sound absorption coefficient and I'm looking for help. I implemented the models and so far so good. But I need help to validate that all implementations are correct. So, I need people to test the code, check for errors (within the mathematical formulations I implemented) and also suggest improvements to the project, models that could still be implemented, among other related things. So, if you have tested the code, I ask you to leave your feedback below.

    help wanted good first issue 
    opened by Toktom 2
Releases(v0.2.1)

  • v0.2.1(Jun 14, 2021)

    Introduced features: [FEATURE] Delany-Bazley (with Miki and Allard-Champoux variation) model [FEATURE] Biot-Allard model [FEATURE] Johnson-Champoux (with Allard and Lafarge variation) [FEATURE] Rayleigh [FEATURE] Functions for calculating air properties (also has a class alternative, highly recommended) [FEATURE] Material class

    Source code(tar.gz)
    Source code(zip)
Owner
Michael Markus Ackermann
Acoustical Engineering Student
Michael Markus Ackermann
GitHub Repository
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