Welcome to PyFilterbank’s documentation!

The package pyfilterbank provides tools for the acousticians and audiologists working with python.

A fractional octave filter bank is provided in the module octbank. You can use it to split your signals into many bands of constant relative fractional octave band width. The output signals stay in the same domain as the input signal but are band passed groups of it. The filtering routines are placed in sosfiltering and the filter design functionality is implemented in butterworth.

Spectral weigthing for level measurements can be done with the tools in splweighting. For fft-based and more physiological motivated filtering there is the module melbank with some tools for transforming linear spectra to mel-spectra.

A gammatone filter bank and stft is planned but no implemented yet. If there is time and some other persons are intersted in contributing, there are many functionalites that can be added and maintained.

Have Fun!

GitHub Repo

http://github.com/SiggiGue/pyfilterbank

Content

• Fractional Octave Filter Bank
  • References
  • Functions
• Mel Filter Bank
  • Functions
• Gammatone Filter Bank
  • Examples
  • References
  • Functions
• Spectral Weighting Filters
  • Implemented weighting functions
  • References
  • Functions
• Second Order Section Filtering
  • Compiling the c source
  • Functions
  • butterworth
• Indices and tables

License

pyfilterbank is licensed unter the BSD 4-clause license:

Copyright (c) 2014, Siegfried Gündert All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed by the <organization>.
4. Neither the name of the <organization> nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ‘’AS IS’’ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.