CLIOwin 6.5 PCI User's Manual - Audiomatica Srl

13.7 THIELE & SMALL PARAMETERS
13.7.1 INTRODUCTION
CLIO handles Thiele and Small Parameters, hereafter TS, as a post process of impedance
measurements. Three options are available for data source, selected by the Data Origin
Drop Down Control: Sinusoidal Impedance Data, Mls Impedance Data, File Data, the
last created with either of the previous. There are no conceptual differences between
File and the first two options, aside where the data resides. Choosing Sinusoidal or Mls,
user should have one of these measurements in memory while the File Data option will
prompt for file selection. Impedance measurements are therefore central topic and the
previous paragraphs are an essential background. To get the full set of TS, two
impedance curves are needed. The first is the loudspeaker free air impedance, the
second, the impedance obtained either with Delta Mass or Delta Compliance method.
The first consists in adding a suitable Known Mass to the Loudspeaker cone, the latter
in loading the cone with a Known Volume.
13.7.2 T&S PARAMETERS CONTROL PANEL
The User Interface is quite simple with three Buttons, one Drop Down and one Check
Box.
Starts a T&S Parameters procedure. See 13.7.3 for details.
Delta mass T&S Parameters calculation. See 13.7.3 for details.
Delta compliance T&S Parameters calculation. See 13.7.3 for details.
The Drop Down allows selecting the data origin as described in the introduction. The MSE
Check Box, when checked, enables a Minimum Square Error routine while calculating
TS Parameters; more on this later. Aside information regarding the device tested the
Control Panel displays 27 parameters. Here is what they are.
138 Chapter 13 - Measuring impedance and T&S parameters