Acoustical Spherical Array Processing Library

Spherical microphone array processing, beamforming, DoA estimation, and sound-field analysis.

# Spherical-Array-Processing
A collection of MATLAB routines for acoustical array processing on spherical harmonic signals, commonly captured with a spherical microphone array.
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> Archontis Politis, 2014
> Department of Signal Processing and Acoustics, Aalto University, Finland
> [e-mail]
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This library was developed during my doctoral research in the [Communication Acoustics Research Group] (http://spa.aalto.fi/en/research/research_groups/communication_acoustics/), Aalto, Finland. If you would like to reference the code, you can refer to my dissertation published [here](https://aaltodoc.aalto.fi/handle/123456789/22499):

Archontis Politis, Microphone array processing for parametric spatial audio techniques, 2016
Doctoral Dissertation, Department of Signal Processing and Acoustics, Aalto University, Finland

## Description <a name="description"></a>

This is a collection MATLAB routines that perform array processing
techniques on spatially transformed signals, commonly captured with
a spherical microphone array. The routines fall into four main
categories:

1. obtain spherical harmonic (SH) signals with broadband characteristics,
as much as possible,

2. generate beamforming weights in the spherical harmonic domain (SHD)
for common signal-independent beampatterns,

3. demonstrate some adaptive beamforming methods in the SHD,

4. demonstrate some direction-of-arrival (DoA) estimation methods in the
SHD,

5. demonstrate methods for analysis of diffuseness in the sound-field

6. demonstrate flexible diffuse-field coherence modeling of arrays

The latest version of the library can be found at

https://github.com/polarch/Spherical-Array-Processing

Detailed demonstration of the routines is given in TEST_SCRIPTS.m and at

http://research.spa.aalto.fi/projects/spharrayproc-lib/spharrayproc.html

The library relies in the other two libraries of the author related to
acoustical array processing found at:

https://github.com/polarch/Array-Response-Simulator
https://github.com/polarch/Spherical-Harmonic-Transform

They need to be added to the MATLAB path for most functions to
work.

For any questions, comments, corrections, or general feedback, please
contact [e-mail]