X212AFD
July 2021
6
Amate Audio
Fig.4.
Tilt angle between cabinets (8º maximum)
1.3 Fresnel Region (Near Field) and Fraunhofer Region (Far Field)
As our system is able to fulfil the previous conditions it will produce cylindrical waves
to a maximum frequency. The wave will be flat up to a certain distance where it will
start to become spherical (depending on the frequency and the size of the array).
The limit distance between the zone of cylindrical waves (Fresnel) and spherical
waves (Fraunhofer) can be calculated through the following formula:
2
2
3
1
1
2
3
−
=
Hf
f
H
d
c
where,
d
c
= limit distance between near field and far field (in metres)
H = height of the array (in metres)
