To do this, sound passing through a surface is recorded as a two-dimensional pattern called a hologram (a type of interferogram).
The hologram contains information about the phase and amplitude of the sound waves passing though.
A set of intermediate holograms are produced, one for each frequency bin used in the transform.
[1] Acoustic holography is becoming increasingly popular in various fields, most notably those of transportation, vehicle and aircraft design, and noise, vibration, and harshness (NVH).
[4] For audio rendering and production, Wave field synthesis and higher-order Ambisonics are related technologies, respectively modeling the acoustic pressure field on a plane, or in a spherical volume.