User`s manual

Root File Name and browse button
The name of one file within the set to be displayed. By pressing the associated
button it is possible to browse the disk and choose the file.
Symmetry
Select the file set symmetry between: None, Half, Quarter, Axial and H+V.
Rotation
Rotation of the THETA=0 reference angle. The THETA=0 angle is by CLIO
conventions oriented as the positive direction of the x-axis. If the data set is
saved with a different THETA angle origin the rotation allow to compensate for
this. As an example if the data set is saved with THETA origin oriented in the
negative direction of the y-axis, the correct setting is Rotation=-90.
The radiation characteristics of a loudspeaker or driver versus frequency and
direction rely on a huge amount of data i.e. a set of frequency responses (taken at
5 degree resolution) saved to disk.
With the 3D analysis you get a powerful way for synthesizing a large number of
measurements in a single balloon graph.
In order to identify the set of files it is important that all of their names follow a
particular syntax, that gives certain information to the processing routines.
The syntax follows: <NAME><PHI*100><THETA*100>.MLS
NAME is a common file name, PHI is the polar angle and THETA is the azimuth
angle. These quantities are separated by spaces. While it is possible to give
negative numbers to THETA and PHI, we do suggest to collect measurement sets
using only positive numbers.
THETA is the polar angle between the loudspeaker axis and the measurement
microphone, PHI is the azimuth angle. Positive THETA angles are related to the
counterclockwise rotation of the measuring microphone (apparent rotation since it
is the loudspeaker that is rotating clockwise) around the loudspeaker. Positive PHI
angles are related to the counterclockwise rotation of the DUT around its on-axis
direction.
The coordinate system used by CLIO is defined as in the following figures:
x
y
z
θ
φ
x
y
z
polar
azimuth
170 12 WATERFALL , DIRECTIVITY & 3D