Schnelle Multipolverschiebung für Ambisonics im Zeitbereich

Diploma thesis (pdf 5.780 KB)

There arise more and more possibilities to make sound sources and their emitted acoustic fields audible in a realistic way especially due to modern sound reproduction methods like Ambisonics and Wave Field Synthesis. One important aspect in research in this field is the auralisation of directive sound sources. If such a source moves and rotates in space, the resulting tonal changes can be described as proper translation terms. In Ambisonics these operations are expressed as filter matrices.

The aim of this work is the implementation and stabilisation of these filter matrices in the time domain with regard to real time applications. With the help of the realised translation filters future applications in broad band acoustic sound fields are expected.

So the displacement of sound sources is stated in this work as a matrix, composed by nearly stable and time discrete IIR-filters which are determined analytically directly out of the theoretical basics. The emerging filters are designed for playback of multi channel directivity data of sound sources with a multi channel Ambisonics surround loudspeaker setup. Additionally, strategies for translation of incident acoustic fields in combination with possibilities for stabilisation of the developed filters are part of this work.