AES E-Library

A Soundfield Microphone Using Tangential Capsules

The traditional soundfield microphone is a tetrahedral array of pressure gradient microphones [1], the outputs of which are linearly combined in order to realize signals that are proportional to co-located microphones, one with omnidirectional sensitivity and three orthogonal microphones with figure-of-eight sensitivity. This configuration works well and has been the basis of commercial products for a number of years. This design with the capsules oriented radially can in principle be extended to higher orders, especially using geometries from other platonic solids such as the dodecahedron. Recently, a new array type has been disclosed [2,3] by Craven, Law, and Travis, comprised of pressure gradient sensors arranged with their principle axes oriented tangentially with respect to the center. Additional analysis has been performed and several prototypes were constructed and evaluated.

Author: Benjamin, Eric
Affiliation: Surround Research, Pacifica, CA, USA
AES Convention:129 (November 2010) Paper Number:8240 Import into BibTeX
Subject:Loudspeakers and Microphones

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 129Papers)   /129/8240.pdf

Start a discussion about this paper!