Representation of sound fields for audio recording and reproduction

Filippo Fazi , Markus Noisternig (1) , Olivier Warusfel

1 STMS - Sciences et Technologies de la Musique et du Son

Spherical and circular microphone arrays and loudspeaker arrays are often used for the recording and reproduction of a given sound field. A number of approaches and formats are available for the representation of the recorded field, some of which are more popular among the audio engineering community (B-format, virtual microphones, etc.) whilst other representations are widely used in the literature on mathematics (generalized Fourier series, single layer potential, Herglotz wave function, etc.). In this paper, some of the properties of the various approaches and some of their differences are discussed. The analysis includes the representation of near-field sources and the choice of basis functions used for the representation.

Mots clés: sound field; 3D audio; multi-channel audio; microphone arrays

Domaines: Acoustique [physics.class-ph]

Filippo Fazi, Markus Noisternig, Olivier Warusfel. Representation of sound fields for audio recording and reproduction. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811313⟩