CLIOwin 7 PCI User's Manual - Audiomatica

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12.3.2 WATERFALL OPERATION As already stated, the data source for a CSD or ETF waterfall is a measured impulse response Once you have loaded an impulse response inside the Waterfall control panel you may easily inspect it, in the same way you also do with the MLS Impulse control panel (see chapter 10). Of great importance is to select the start time and stop time of the analysis: start time, the Start Window value selected in the impulse response represents time zero for the waterfall; stop time, the Stop Window value selected in the impulse response represents the last processed CSD slice unless a different Time Shift has been selected. CSD (Cumulative Spectral Decay) is intended primarily for anechoic loudspeaker evaluation; in this case only the data between the start and stop time is analyzed; each successive slice considers time data from its relative start time (the rearmost, at time zero, has start time equal to the start window of MLS) to the fixed stop time, the data being windowed by a particular time window with a smoothed rising edge (see literature for a discussion about this). Normal values for the Window Rise Time lie within 0.1 and 0.6ms. In CSD mode, should the Time Shift value be left at zero, the routine will automatically calculate it, spacing the selected Number of Spectra in the interval defined by start and stop times; if Time Shift is forced by the user be sure to set it small enough to permit the last spectra to be calculated; if the fixed stop time is passed, then the calculation defaults as in case of zero Time Shift. When representing a CSD the program automatically hides the low frequency part of the spectra that has become unreliable due to the time-frequency uncertainty principle. ETF (Energy Time Frequency) is intended for room acoustic evaluation; in this case all MLS data starting from the start time are computed; then, successive slices are calculated moving their initial point of the Time Shift value (see 12.3.1 the Settings dialog). 146 Chapter 12 - Waterfall and Directivity
12.4 MAKING A CUMULATIVE SPECTRAL DECAY A cumulative spectral decay starts loading an impulse response from disk. Suppose we have taken an anechoic response of a medium sized two ways loudspeaker; the impulse response is shown in Fig.12.3. Let's first select a reflection free part of it. By selecting the start and stop window points we obtain the first two information parameters required for the waterfall facility: zero time will be referenced to the start of the start window, while the Z axis will provide the measurement range between the stop and start window points (unless a Time Shift is chosen). Figure 12.3 Going inside the Waterfall Settings dialog we decide to view our measurement between 150 and 20000Hz, then apply 1/12 octave smoothing. We are now ready for a waterfall! Figure 12.4 The Go button is enabled. Press it, you should obtain a waterfall like the one in the left part Fig. 12.5. Press now the Color Scale button followed by the Interpolate Colors buttons, now you should have the color map shown in the right part of Fig. 12.5. The two representations are not exclusive, they mutually complement each other; you will gain experience understanding all the subtle details of a waterfall processing and how they are represented either in the 3D or in the color map. For example the color map represents better the frequency of decaying modes as they result as straight color patterns parallel to the time axis; the 3D waterfall is more familiar when you look at zero time frequency plot and try to visualize how it modifies during decay. Chapter 12 - Waterfall and Directivity 147
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ELECTRICAL & ACOUSTICAL TESTS User'
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CONTENTS 1 INTRODUCTION ...........
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7.10 SIGNAL FILES .................
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14.1 INTRODUCTION .................
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AUDIOMATICA’S WARRANTY Audiomatic
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12 Chapter 1 - Introduction
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2.1 THE PB-4281 PC BOARD AND SC-01
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2.2.3 THE MIC-01 (OR MIC-02) FREQUE
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2.4 THE QCBOX MODEL 4 AMPLIFIER & S
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2) 2 x Stereo mini jack to two RCA
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3.3 HARDWARE REGISTRATION WITH WIND
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3.3.2 HARDWARE REGISTRATION UNDER W
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3.3.3 HARDWARE REGISTRATION UNDER W
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Figure 3.21 Let's now verify that t
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3.4 SOFTWARE INSTALLATION This para
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3.6 RUNNING CLIOWIN FOR THE FIRST T
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3.7.1 CALIBRATION VALIDATION Figure
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3.9 TROUBLESHOOTING CLIO INSTALLATI
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4.3 CLIOWIN DESKTOP The CLIOwin des
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4.5 HARDWARE CONTROLS TOOLBAR 4.5.1
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4.5.4 MICROPHONE CONTROL Switches C
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4.6.2 CONTROLLING A TURNTABLE Fig.4
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4.7.2 ANALYSIS MENU The Analysis me
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Fig. 4.16 Sinusoidal Submenu Fig. 4
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4.7.3 CONTROLS MENU The Controls Me
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4.8 BASIC CONNECTIONS In order to c
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4.8.3 CONNECTING THE CLIOQC AMPLIFI
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T&S parameters data files. Wow&Flut
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Invokes the Autosave Settings dialo
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5.3.4 PRINTING Enters the Notes dia
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customize up to 6 different color s
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5.7.1 SAVING MEASUREMENT SETTINGS M
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6.3 BUTTONS AND CHECKBOXES Moves (s
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6.6 THE MLS TIME DOMAIN DISPLAY Whe
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The following figure shows a 1031.2
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7.4 MULTITONES It is possible to ge
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7.6 MLS It is possible to generate
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7.8 The following figure shows a 20
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The following figure shows the same
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For comparison with Pink noises the
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The following figure shows a msampl
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84 Chapter 7 - Signal Generator
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8.2.1 TOOLBAR BUTTONS Starts the me
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This is substantially the measureme
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With the Multi-meter running, fit t
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8.6 INTERACTION BETWEEN THE MULTI-M
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9.2.1 TOOLBAR BUTTONS, DROP DOWN LI
Page 96 and 97: 9.4 FFT SETTINGS DIALOG Fig. 9.2 Th
Page 98 and 99: A better approach is to center the
Page 100 and 101: it is necessary to remove the fligh
Page 102 and 103: 80.0 CLIO dBSPL 70.0 60.0 50.0 40.0
Page 104 and 105: 9.10 “LIVE” TRANSFER FUNCTION A
Page 106 and 107: Another factor of maximum importanc
Page 108 and 109: The last obstacle you may find whil
Page 110 and 111: 10.2.1 TOOLBAR BUTTONS Starts an ML
Page 112 and 113: Amplifier & SwitchBox Model 2,3 and
Page 114 and 115: 10.4 MEASURING FREQUENCY RESPONSE I
Page 116 and 117: 150.0 CLIO 180.0 150.0 CLIO 180.0 O
Page 118 and 119: speaker we are testing is a gloriou
Page 120 and 121: 10.4.4 PHASE & GROUP DELAY We used
Page 122 and 123: etween true phase, as in Fig.10.22,
Page 124 and 125: 10.5 OTHER TIME DOMAIN INFORMATION
Page 126 and 127: utton. Any process you execute can
Page 128 and 129: 10.7 MLS Vs. LOG CHIRP As anticipat
Page 130 and 131: 10.8 RELATED MENUS The dual domain
Page 132 and 133: Display fifth harmonic distortion,
Page 134 and 135: Gating (Acquisition) Settings Gated
Page 136 and 137: 11.3 A BRIEF DESCRIPTION ON SETTING
Page 138 and 139: 11.3.3 GATING Enabling Gating allow
Page 140 and 141: 11.4 DISTORTION AND SETTINGS Sinuso
Page 142 and 143: Finally Fig.11.12 shows the distort
Page 144 and 145: 12.2 WATERFALL AND DIRECTIVITY CONT
Page 148 and 149: Figure 12.5 One powerful way to ins
Page 150 and 151: 12.5 DIRECTIVITY SPECIFIC CONTROLS
Page 152 and 153: 12.6 MEASURING AND REPRESENTING LOU
Page 154 and 155: 12.6.4 REPRESENTING POLAR DATA To r
Page 156 and 157: 156 Chapter 12 - Waterfall and Dire
Page 158 and 159: If you are a novice in using CLIO,
Page 160 and 161: life harder even if more interestin
Page 162 and 163: 13.4 I SENSE This requires Audiomat
Page 164 and 165: 0.0 CLIO 180.0 dBV Deg -10.0 108.0
Page 166 and 167: CLIO INPUT A INPUT B OUTPUT A OUTPU
Page 168 and 169: 13.7 THIELE & SMALL PARAMETERS 13.7
Page 170 and 171: L 1kHz L 10kHz Inductance at 1kHz I
Page 172 and 173: We can now save our complete result
Page 174 and 175: The graphs refers to a linearity me
Page 176 and 177: DIN measures Intermodulation distor
Page 178 and 179: 15.2.1 TOOLBAR BUTTONS AND DROP DOW
Page 180 and 181: 15.3 ACOUSTICAL PARAMETERS SETTINGS
Page 182 and 183: RTU [s]. Reverberation time evaluat
Page 184 and 185: 184 Chapter 15 - Acoustical Paramet
Page 186 and 187: 16.2.1 TOOLBAR BUTTONS AND DROP DOW
Page 188 and 189: 16.3 Leq SETTINGS Time resolution S
Page 190 and 191: 17.3 FEATURES Figure 17.2 Aside a s
Page 192 and 193: 192 Chapter 17 - Wow & Flutter
Page 194 and 195: [20] D. Clarke, “Precision Measur
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196 Norms
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