VSS15 Planar Volume Sound Source | Standard Exciter for Automotive Road Noise NVH Test
2026-05-22Core Industry Testing Dilemma
In automotive road noise NVH measurement, inaccurate and unrepeatable data rarely stems from acquisition hardware. Unstandardized excitation sound source acts as the main cause.
Conventional point sound sources have obvious defects: uneven spherical sound field, insufficient low-frequency excitation, power output drift and limited coverage on full vehicle body. These flaws lead to invalid data of TPA analysis and noise transmission testing.
VSS15 is a professional planar volume sound source developed exclusively for automotive road noise NVH tests. Featuring uniform plane wave excitation, wide-band high power and steady closed-loop output, it perfectly fits diverse vehicle acoustic experiments and serves as optimal standard testing equipment for automakers and third-party laboratories.
Key Technical Parameters
| Indicator | Specification |
|---|---|
| Frequency Response | 100Hz~5000Hz, compliant with GB/T 12060.5-2011 |
| Sound Power Level | 123dB under pink noise, over 100dB in 1/3 octave band |
| Dimension & Weight | 600×115×450mm, 9kg, easy handling |
| Power Supply & Interface | Rated 250W, peak 500W, compatible with standard audio power supply protocol |
Four Main Applicable NVH Testing Scenarios
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Road Noise Reciprocity Test
Built-in reference microphone realizes real-time closed-loop sound power calibration. It eliminates output drift, ensures traceable transmission function data and supports reverse road noise simulation calculation.
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TPA Vibration & Noise Transfer Path Analysis
Standard plane wave simulates actual road noise incidence. Even coverage on wheel arch, chassis and vehicle side panel avoids spherical field deviation, enabling accurate contribution analysis of each noise path.
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Pre-calibration of Auto Components
Full 100Hz-5kHz frequency range and 123dB high sound power simulate intense road excitation. It improves signal-to-noise ratio and suits sound insulation and absorption test of door, chassis and cavity structures.
-
SEA Analysis & Large-scale Acoustic Test
Applicable to full vehicle SEA model calibration. Expandable module design enlarges radiation area to meet uniform excitation demands of complete vehicle and cabin space.
Flexible Modular Structure
VSS15 adopts flexible modular combination design. Equipped with bottom shock-absorbing pads and side assembly holes, multiple units can be spliced freely just like building blocks.1
- Scalable coverage: A single unit meets small laboratory tests. Combined units form industrial-grade excitation system, supporting full vehicle sound insulation analysis and building acoustic material detection.
- Plug-and-play operation: Adopts speakON audio interface for fast connection. Matched BNC output reference microphone cuts commissioning time greatly.
FAQ
Q: What advantages does VSS15 have over traditional point sound sources?
A: It provides even plane wave field, sufficient low-frequency excitation and stable power output, effectively improving data accuracy and repeatability.
Q: What kinds of NVH tests can this sound source conduct?
A: It supports reciprocity test, TPA analysis, component acoustic calibration and SEA modeling for automotive research.
Q: Can multiple devices be assembled for large-scale testing?
A: Yes. Modular splicing design allows flexible expansion to fit full vehicle and large space acoustic measurement.
References
1 Automotive NVH Acoustic Excitation Device Design Specification
2 GB/T 12060.5-2011 Acoustics - Sound power level determination of noise sources
