Samuel Verburg (DTU) presents 'Spatial reconstruction of sound fields sensing methods'
The reconstruction of sound fields over large volumes requires an unfeasibly large number of pressure measurements. In order to alleviate this requirement, other sensing principles and/or prior information about the sound field can supplement or substitute point-wise microphone measurements. In room acoustics, the boundaries of the room are frequently assumed to be rigid, i.e. the particle velocity normal to the walls/ceiling/floor is zero. This information can be used to improve the reconstruction and alleviate the number of measurements required. In this talk we will discuss the validity of assuming perfectly rigid boundaries in conventional rooms, and how knowledge of the vibrational velocity of the boundaries of a room can be used to reconstruct the sound field inside it. In addition, we will explore a sensing method based on the acousto-optic interaction in the case where the vibrational velocity of the room boundaries can be considered null.