Spherical Beamforming
Spherical beamforming is a new technology allowing a full 360 degree overview sound field map also in confined environments such as a car or aircraft cabin without making any assumptions about the sound field.
You can use Spherical Beamforming to make a quick map of the sound field and possibly perform further analysis by using the Patch Holography or Conformal Mapping applications that can be run on the same system.
Data is acquired by placing a sphere at the centre of the measurement area. The sphere has microphones and cameras distributed on the surface allowing a full 360 by 180 degree map that can be made without knowing the geometry of the measured object.
Key features
 | Acoustic Holography
Brüel & Kjær has long since been a pioneer in the field of acoustic holography offering solutions both for stationary and non-stationary sound fields.
Spatial Transformation of Sound Fields (STSF)
The name "Spatial Transformation of Sound Fields (STSF)" gives a good indication of the capabilities of the technique. Based on a measurement over a "scan plane" ... |
 | Conformal Mapping Using SONAH
Conformal mapping provides a map of sound pressure, sound intensity or particle velocity directly on the actual surface geometry of arbitrary surfaces. Other mapping methods are typically restricted to work on simplistic planar (or spherical) approximations to the source geometry either for practical reasons or due to algorithmic limitations Using a local SONAH approach the system calculat... |
