EAW Resolution Especificaciones Pagina 26
- Pagina / 114
- Tabla de contenidos
- SOLUCIÓN DE PROBLEMAS
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
EAW Smaart 6 Operation Manual Concepts, Glossary, and Bibliography
26
2.1.5 Frequency Resolution
The frequency resolution (Q) of an FFT is equal to the sampling rate divided by the FFT
size. The frequency data points in an FFT are distributed linearly along the frequency
axis at intervals of Q Hz, from 0 to the Nyquist Frequency (1/2 the sampling rate). For
example, with a sampling rate of 44.1 kHz, an FFT size of 4096 (4 k) yields a frequency
resolution of 10.77 Hz. The resulting FFT has a data point every 10.77 Hz, 0-22.05 kHz.
Fixed-Point Per Octave (FPPO) Frequency Response Display
One problem associated with the linear distribution of FFT data points arises from the
fact that we hear frequencies logarithmically. Human hearing perceives each doubling
of frequency as an equal interval so each higher octave contains twice as many frequencies
as the one below. Using the example discussed on the previous page, in an FFT with a
frequency resolution of 10.77 Hz, there will be only three data points in the range 31.5-
63 Hz (the center frequencies of the two lowest octaves), providing very poor resolu-
tion. In the two highest octaves, the span between the center frequencies (8-16 kHz) is
8 kHz, yielding more than 700 data points. When viewed using a logarithmic frequency
scale, these data points are densely packed, creating a very difficult display to interpret.
Smaart 6 addresses this problem by using multiple FFTs, at different sampling rates and
FFT sizes, then combining the results to provide equal resolution in every octave, except
the two lowest. The resolution of the Real-time mode display is 24 points per octave
above 44 Hz, with 24 points distributed over the two lowest octaves. Note that using
multiple FFTs results in a longer time window at lower frequencies and a shorter time
window at higher frequencies.
Frequency Resolution and Octave/Fractional Octave Band Displays
For Spectrum measurements, the multiple-FFT technique used to measure Frequency
Response is not an option due to a mathematical limitation and so all RTA displays are
created from single FFTs. Since the linear distribution of FFT points in a single FFT
yields lower resolution in the lower than higher octaves, there may be bands at the low end
that contain only 0 or 1 data point, depending on the display and FFT input parameters.
The wider spacing between FFT data points in the lower octaves accounts for the missing
teeth seen at the low end in banded displays on some FFT-based analyzers. Smaart uses
an advanced algorithm to properly distribute energy into bands at low frequencies but
very sparse FFT data limits its effectiveness. Therefore, it is still advisable to select FFT
parameters that provide good frequency resolution at the lowest frequencies required.
- USER GUIDE 1
- Table of Contents 3
- List of Figures 7
- Chapter 1: Getting Started 9
- 1.1.2 Measurement Microphone 11
- 1.1.3 Microphone Preamplifier 11
- 1.2.1 First Time Installation 12
- 1.3 Smaart 6 Signal I/O 14
- 1.4.1 The Menu Bar 17
- 1.4.2 The Plot Area 17
- 1.4.3 Cursor Readout 17
- 1.4.4 Start/Stop Buttons 17
- 1.4.6 Display Controls 18
- 1.4.8 Signal Generator 19
- 1.4.9 Internal Delay Control 20
- 1.5 How to use this Manual 21
- 2.1 Concepts 23
- 2.1.2 Fast Fourier Transform 24
- 2.1.3 Averaging 25
- 2.1.4 Sampling Rate 25
- 2.1.5 Frequency Resolution 26
- 2.1.6 Pink and White Noise 27
- 2.1.7 Data Window Functions 28
- 2.1.8 Impulse Response 29
- 2.1.9 The Transfer Function 29
- 2.1.10 Coherence 30
- 2.1.11 Signal Alignment 30
- 2.2 Glossary of Terms 31
- 2.3 Selected Bibliography 34
- 3.1 Spectrum Measurements 38
- 3.1.2 Spectrograph 40
- 3.2.3 The Magnitude Display 45
- 3.2.4 The Phase Display 46
- 3.2.5 Time Windowing 46
- 3.2.6 Averaging and Smoothing 47
- 3.2.8 Magnitude Thresholding 51
- 3.3.3 Automatic Delay Locator 55
- 3.4 SPL Measurements 56
- 3.4.2 Calibrating to SPL 57
- Figure 3-14 Legend dialog 61
- 3.6 Internal Delay 63
- 3.7 Internal Signal Generator 63
- 3.8 Weighting Curves 65
- 3.9 External Device Control 66
- 3.10 The Locked Cursor 68
- 3.11 Smaart 6 Screen Capture 69
- Chapter 4: Applications 71
- Measurement Signal 75
- Reference Signal 75
- Computer 75
- Line Out 75
- Equalizer 75
- 4.3 Measuring a Loudspeaker 77
- 4.3.1 Adjust Signal Levels 78
- Step 1: Evaluation Listening 85
- Step 4: Compare Positions 86
- Step 6: Critical listening 86
- Step 7: Stability Testing 87
- Chapter 5: Smaart 6 Commands 91
- 5.3 Options Menu 93
- 5.3.2 Frequency Response 95
- 5.3.3 IR Analysis 97
- 5.3.4 Audio I/O 98
- 5.3.5 Delay 99
- 5.3.6 Zoom 101
- 5.3.7 Instantaneous 101
- 5.4 Help Menu 102
- 5.5 Keyboard Shortcuts 103
- External Device Control 104
- Options Menu Shortcuts 104
- Chapter 6: Troubleshooting 105
- 6.3 Sound Hardware Problems 107
- 6.4 Performance Issues 108
- 6.5 Font and Display Problems 108
- EAW Smaart 6 Operation Manual 111
Relacionado con productos y manuales para Software EAW Resolution
Software EAW EAWPilot Manual de usuario
(36 paginas)
(36 paginas)
Software EAW Resolution Manual de usuario
(36 paginas)
(36 paginas)
Software EAW Resolution Especificaciones
(89 paginas)
(89 paginas)
Software EAW Resolution El manual del propietario
(16 paginas)
(16 paginas)
Sony SAL70300G manuali
Manuali dei proprietari e guide per l'utente per no Sony SAL70300G.
We fornisce 6 manuali pdf Sony SAL70300G per scaricare gratuitamente in base al tipo di documento: Manuale Utente
Indice
Indice
Indice
Sony SAL70300G Manuale Utente (12 pagine)
Marchio: Sony | Categoria: No info | Dimensione: 0.26 MB |
Indice
Indice
Più prodotti e manuali per no Sony
| Modelli | Tipo di Documento |
|---|---|
| DSC-T300 |
Manuale Utente
Sony DSC-T300 Käyttöohjeet,
148 pagine
|
| KLV-30HR3 |
Manuale Utente
Sony KLV-30HR3 Installationshandbok,
2 pagine
|
| D-CJ501 |
Manuale Utente
Sony D-CJ501 Mode d’emploi,
32 pagine
|
| NWZ-B183F |
Manuale Utente
Sony NWZ-B183 Walkman with Built-in USB Startup Guide,
2 pagine
|
| DSC-T70 |
Manuale Utente
Sony DSC-T70 Инструкция по эксплуатации,
151 pagine
|
| VPCYA1C5E |
Manuale Utente
Sony VPCYA1C5E Інструкції з експлуатації [nl] ,
143 pagine
|
| DVP-NS300 | Manuale Utente Sony DVP-NS300 Bruksanvisning, 76 pagine |
| SPK-CXA |
Manuale Utente
 
Sony SPK-CXA CXA Водозащитный корпус Инструкция по эксплуатации [es] [fr] [it] [ja] [th] [tr] ,
2 pagine
|
| DSLR-A380 |
Manuale Utente
Sony DSLR-A380 DSLR-A380 Pouze tělo (bez objektivu) Rychlé nastavení a průvodce spuštěním,
1 pagine
|
| STR-DA3200ES |
Manuale Utente
Sony STR-DA3200ES Käyttöohjeet,
255 pagine
|
| SPK-HCD |
Manuale Utente
Sony SPK-HCD Operating Instructions,
2 pagine
|
| NSZ-GS7 | Manuale Utente Sony NSZ-GS7 Οδηγός γρήγορης εγκατάστασης και έναρξης [es] , 2 pagine |
| STR-DH590 |
Manuale Utente
Sony STR-DH590 5.2k AV zesilovač domácího kina Návod k obsluze,
110 pagine
|
| BDV-E970W |
Manuale Utente
Sony BDV-E970W BDV-E970W Blu-ray 3D™ und DVD-Home Entertainment-System Kurzanleitung,
2 pagine
|
| XM-SD14X |
Manuale Utente
Sony XM-SD14X Käyttöohjeet,
2 pagine
|
| NP-FV100 |
Manuale Utente
Sony NP-FV100 NP-FV100 V-Series Rechargeable Battery Pack Operating Instructions [pl] ,
2 pagine
|
| HDR-AS300 | Manuale Utente Sony HDR-AS300 Οδηγός γρήγορης εγκατάστασης και έναρξης, 2 pagine |
| STR-DH130 | Manuale Utente Sony STR-DH130 2-kanalig stereoreceiver Snabbstartguide, 2 pagine |
| NW-WS623 |
Manuale Utente
  
Sony NW-WS623 BLUETOOTH® Kablosuz Teknolojisine sahip, suya ve toza dayanıklı Walkman® Kullanım Talimatları - Walkman®'inizi Havuz veya Denizde Kullanmadan Önce Okuyun,
2 pagine
|
| SEL50F14Z |
Manuale Utente
Sony SEL50F14Z Planar T* FE 50mm F1.4 ZA Istruzioni per l'uso,
2 pagine
|
© 2020, manymanuals.es. Todos los derechos reservados | 0.031 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales