V-Listen is a professional acoustics and vibration analysis platform designed for engineers working in noise, vibration, and harshness (NVH), sound quality, structural dynamics, and environmental noise testing. Built on a modern WPF/.NET architecture, V-Listen delivers laboratory-grade analysis through a streamlined, single-application workflow—from data acquisition to final reporting.
V-Listen follows three core principles:
V-Listen ships with over 70 native analysis engines organized into the following functional modules:
Time-frequency decomposition using FFT-based methods. Includes narrowband spectra, 1/n-octave band analysis (1/1, 1/3, 1/12, 1/24 octave), power spectral density (PSD), cross-spectral density, and spectrogram (FFT vs. Time) visualization with configurable window functions, overlap, and averaging.
RPM-synchronous analysis for rotating machinery. Supports order spectrum, order vs. RPM tracking, overall level vs. RPM, and multi-order extraction. Accepts tacho pulse or encoder signals for precise angular resampling.
Perceptual metrics aligned with ISO 532, ECMA-418, and DIN 45631/45692 standards:
Frequency Response Function (FRF) measurement and curve fitting for structural dynamics. Supports impact hammer and shaker excitation, H1/H2/Hv estimators, and modal parameter extraction (natural frequencies, damping ratios, mode shapes).
Output-only modal identification from operational data without controlled excitation. Applicable to in-service structures, vehicles, and large civil engineering assets.
Visualization of structural deformation patterns at specific frequencies or orders under actual operating conditions. Integrates with imported geometry models for animated deflection display.
Condition monitoring and fault detection for rotating equipment. Envelope analysis, cepstrum analysis, and bearing fault frequency identification.
Sound power level determination according to ISO 3741 (precision), ISO 3744 (engineering), and ISO 3745 (anechoic/hemi-anechoic) measurement standards.
| Hardware | Manufacturer | Connection | Adapter Module |
|---|---|---|---|
| NI DAQ devices | National Instruments | USB / PCIe | AnalysisWorkbench.Acquisition.Ni |
The acquisition layer is modular. Additional frontend adapters can be developed against the common acquisition interface without modifying the core analysis pipeline.
| Feature | Description |
|---|---|
| Native C# Engines | All 70+ analysis algorithms are implemented in managed C# with full source access—no opaque third-party compute libraries. |
| HDF File Compatibility | Reads industry-standard HDF recording files directly, preserving channel metadata, calibration, and tacho signals. |
| Pipeline Architecture | Analysis chains are composed as configurable processing pipelines. Each node is independently testable, cacheable, and replaceable. |
| Single Executable | Acquisition, analysis, visualization, and reporting in one application—no separate tools or manual file transfers. |
| Offline Operation | No license server or internet connection required for analysis. All computation runs locally. |