V-Listen — Professional NVH Signal Analysis Platform
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V-Listen Help System
Acoustics & Vibration Measurement and Analysis Platform
Getting Started
Product Overview
System Requirements
Quick Start Guide
User Interface Guide
Spectral Analysis
FFT / Auto Spectrum
Power Spectral Density (PSD)
Octave Spectrum (1/1, 1/3)
Coherence Function
Transfer Function / FRF
Overall Level (OA)
Level vs Time / vs RPM
Auto / Cross Correlation
Cross Spectrum
FFT Peak Hold
FFT Average
Order Analysis
Order Spectrum
Campbell Diagram (Order vs RPM)
Order Cut
Psychoacoustics
Loudness (ISO 532-1/3, DIN 45631)
Sharpness (DIN 45692)
Roughness
Fluctuation Strength
Tonality (DIN 45681)
Tone-to-Noise Ratio (ECMA-418-1)
Articulation Index
Prominence Ratio
Modal Analysis (EMA / OMA / ODS)
EMA Overview & Workflow
Step 1: Import Geometry
Step 2: Import Test Data
Step 3: Algorithms (PolyProMax / LSCF / LSCE)
Stabilization Diagram
Mode Selection & Quality Score
Step 4: Validation & Mode Shapes
OMA (OPolyProMax / SSI-COV / EFDD)
ODS (Operating Deflection Shape)
Advanced Diagnostics
Envelope Spectrum (Hilbert Demodulation)
Cepstrum Analysis
Wavelet Analysis
Modulation Spectrum
Hilbert Envelope
Kurtosis vs RPM
Sound Power
Sound Power (ISO 3744 / 3745)
Data Management
Supported File Formats
Import & Export
Project Management
Hardware Acquisition
NI DAQ Setup
Online Monitor
Reference
Keyboard Shortcuts
Troubleshooting
Glossary (NVH Terminology)
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