Acoustic holography
Encyclopedia
Acoustic holography is a method that is used to estimate the sound field near a source by measuring acoustic
parameters away from the source via an array of pressure
and/or particle velocity
transducers. Measuring techniques included within acoustic holography
are becoming increasingly popular in various fields, most notably those of transportation, vehicle and aircraft design, and NVH
. The general idea of acoustic holography has led to different versions such as near-field acoustic holography (NAH) and statistically optimal near-field acoustic holography (SONAH).
For audio rendition, the wave field synthesis
is the most related procedure.
Acoustics
Acoustics is the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics...
parameters away from the source via an array of pressure
Pressure
Pressure is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure.- Definition :...
and/or particle velocity
Particle velocity
Particle velocity is the velocity v of a particle in a medium as it transmits a wave. In many cases this is a longitudinal wave of pressure as with sound, but it can also be a transverse wave as with the vibration of a taut string....
transducers. Measuring techniques included within acoustic holography
Holography
Holography is a technique that allows the light scattered from an object to be recorded and later reconstructed so that when an imaging system is placed in the reconstructed beam, an image of the object will be seen even when the object is no longer present...
are becoming increasingly popular in various fields, most notably those of transportation, vehicle and aircraft design, and NVH
NVH
NVH is a three-letter abbreviation with multiple meanings, including:*National R.V. Holdings*Noise, vibration, and harshness*Norwegian School of Veterinary Science...
. The general idea of acoustic holography has led to different versions such as near-field acoustic holography (NAH) and statistically optimal near-field acoustic holography (SONAH).
For audio rendition, the wave field synthesis
Wave field synthesis
Wave field synthesis is a spatial audio rendering technique, characterized by creation of virtual acoustic environments. It produces "artificial" wave fronts synthesized by a large number of individually driven speakers. Such wave fronts seem to originate from a virtual starting point, the virtual...
is the most related procedure.