User`s manual
Table Of Contents
- CONTENTS
- 1 INTRODUCTION
- 2 THE CLIO SYSTEM
- 3 CLIO INSTALLATION
- 3.1 MINIMUM PC CONFIGURATION
- 3.2 FW-01 DRIVERS INSTALLATION UNDER WINDOWS XP
- 3.3 FW-01 DRIVERS INSTALLATION UNDER WINDOWS VISTA AND 7
- 3.4 SOFTWARE INSTALLATION
- 3.5 THE 'CLIO BOX'
- 3.6 RUNNING CLIO FOR THE FIRST TIME
- 3.7 SYSTEM CALIBRATION
- 3.8 CLIO SERIAL NUMBER AND DEMO MODE
- 3.9 TROUBLESHOOTING CLIO INSTALLATION
- 4 CLIO BASICS
- 5 SYSTEM OPERATIONS AND SETTINGS
- 6 COMMON MEASUREMENT INTERFACE
- 7 SIGNAL GENERATOR
- 8 MULTI-METER
- 9 FFT, RTA AND “LIVE” TRANSFER FUNCTION
- 10 MLS & LOG CHIRP
- 11 SINUSOIDAL
- 12 WATERFALL , DIRECTIVITY & 3D
- 12.1 INTRODUCTION
- 12.2 WATERFALL, DIRECTIVITY & 3D CONTROL PANEL
- 12.3 WATERFALL SPECIFIC CONTROLS
- 12.4 MAKING A CUMULATIVE SPECTRAL DECAY
- 12.5 DIRECTIVITY SPECIFIC CONTROLS
- 12.6 MEASURING LOUDSPEAKER SINGLE POLAR DATA (1D MODE)
- 12.7 REPRESENTING SINGLE POLAR DATA
- 12.8 3D SPECIFIC CONTROLS
- 12.9 MEASURING LOUDSPEAKER SINGLE POLAR DATA (3D MODE)
- 12.10 MEASURING FULL SPHERE LOUDSPEAKER POLAR DATA (3D MODE)
- 12.11 REPRESENTING 3D BALLOON DATA
- 12.12 EXPORT 3D BALLOON DATA
- 13 MEASURING IMPEDANCE AND T&S PARAMETERS
- 14 LINEARITY & DISTORTION
- 15 ACOUSTICAL PARAMETERS
- 16 Leq LEVEL ANALYSIS
- 17 WOW AND FLUTTER
- 18 WAVELET ANALYSIS
- BIBLIOGRAPHY
- NORMS

18.4 WAVELET ANALYSIS OPERATION
As already stated the data source for the Wavelet Analysis is a measured impulse
response.
Once you have loaded an impulse response inside the Waterfall Analysis control
panel you may easily inspect it, in the same way you also do with the MLS Impulse
control panel (See chapter 10). The limits in time of the Wavelet Analysis plot will
be the same of the impulse plot view. It is possible to window the impulse response
(by means of a rectangular window) as in MLS&LogChirp control panel prior to the
Wavelet Analysis computation.
Pressing the Go button run the Wavelet Analysis, the calculation time is dependent
from the impulse response size, in older PCs and in case of very long impulse
responses this can take up to 2 minutes. Computation time in a modern PC is
limited to few seconds.
Once the Wavelet is calculated it is possible to zoom in/out into time without
running again the Wavelet Analysis.
18.4.1 TRADING BANDWIDTH AND TIME RESOLUTION
As said before, changing the Wavelet Q parameter is it possible to trade time
resolution with bandwidth resolution.
The product of temporal uncertainty and bandwidth uncertainty is fixed, the Q
parameters lets adjust the frequency resolution that in turns influences time
resolution.
In the following figures some examples of the same impulse response with different
Q are reported.
Figure 18.3 - Wavelet Analyisis of loudspeaker impulse response Q=3
222 18 WAVELET ANALYSIS