Listening with 184 ears: Experiments of Spatial Soundfield Recording

Cheng Fan (ANU)

APPLIED SIGNAL PROCESSING SERIES

DATE: 2013-07-04
TIME: 11:30:00 - 12:15:00
LOCATION: RSISE Seminar Room, ground floor, building 115, cnr. North and Daley Roads, ANU
CONTACT: JavaScript must be enabled to display this email address.

ABSTRACT:
In this talk, we will reveal the successful experiments on soundfield recording earlier this year in ANU's Acoustic Laboratory. The idea of the experiment is to record all the information of a soundfield (both magnitude and phase) using dozens of arrays or hundreds of microphones. The signal processing algorithms and methods are based on Wave Field Synthesis(WFS), Higher-order Ambisonics, spatial cylindrical harmonics and coefficients translations. These "State of the art" experiments are the first implementations of soundfield recording by Higher Order Microphones in the world. We will also proudly demonstrate series of high quality experiment results which proves that this novel system can be implemented on almost any ordinary audio equipments in studios. Due to the challenging nature of spatial acoustic experiments, we also developed massive methodologies to synchronise the equipments, and to automatically localise the audio sensors with excellent precision. With the progress of this seminar, audiences will have a chance to behold how cutting edge telecommunication technologies can be transplanted into its acoustic counterpart and benefit all spatial audio applications now and the future.