Mid-High Frequency VVS
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Sound Intensity Probes
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Particle Velocity Sensors
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Sound Sources | VVS
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Portable Measurement Devices
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Sound Source Localization
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Acoustic Material Testing
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Sound Power & Source Ranking
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End of Line testing software
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Acoustic Testing & Analysis Software
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Sensor Arrays
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Preamplifiers & Frontends
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Accessories
MHVVS, DIRECT VOLUME VELOCITY MEASUREMENT, 300Hz - 12kHz
The mid-high frequency volume velocity source, MHVVS, is completely redesigned to deliver a final product that in any aspect drives it to a higher level. The improved performance going hand in hand with a user-friendly experience puts it top of your mind when looking for a sound source.
Features
- Broad frequency range of 300Hz - 12kHz
- High power output, max Sound Power Level of 107 dB
- Direct volume velocity measurement
- Integrated particle velocity sensor
- Embedded amplifier, making it compact & user friendly
- Fast reciprocal transfer function acquisition
Applications
- Acoustic Transfer Functions
- Panel Noise Contribution Analysis
- Transfer path analysis
- Airborne source quantification
- Sound package evaluation
- Component vibro-acoustic characterization
Curious About Pricing Details?
DIRECT VOLUME VELOCITY AND HIGH OUTPUT LEVEL
This omnidirectional sound source is equipped with a Microflown particle velocity sensor on the tip of its nozzle, being the only source capable of directly measuring the radiated volume velocity for a broad frequency range with unparalleled accuracy.
The source is capable of generating high excitation levels in order to properly excite the sound field under study. An integrated amplifier eliminates the need for external amplifiers and ensures the best performance going hand in hand with a user-friendly experience.
OMNI-DIRECTIONALITY THAT PROVIDES DIRECTION
In the automotive market, a common application where sound sources are applied is transfer path analysis, airborne source quantification and panel contribution analysis. Furthermore, to optimize, troubleshoot and validate sound packages, from BIW, prototype to the final model. Rapidly with the source very locally with high accuracy structures can be excited or fast reciprocal transfer functions measured. Not only full vehicles but also the vibro-acoustic behavior of components like engines, air conditioning units etc. can be measured. The sound source level in combination with the frequency range makes this source a versatile measurement device designed to meet the needs of NVH R&D departments.
Cross-compatibility with all major third party software platforms
The reference sensor incorporated in all Volume Velocity Sources (VVS) is natively supported by all modules of Microflown's software Velo. In addition, with the recent introduction of a programmable signal conditioner (MFPA-VVS), the sources can also be used seamlessly with the following software platforms:
- Head acoustics ArtemiS SUITE
- Müller BBM PAK 6.x
- Siemens Simcenter Testlab
MFPA-VVS
The MFPA-VVS is a 1-channel signal conditioner is specially designed for our Volume Velocity Sources. The MFPA-VVS main usage is to power and amplifies the received particle velocity signal to 1 channel line-level BNC output. However with the MFPA-VVS, there is more, thanks to its build-in correction its provide a flat, corrected output. Enabling compatibility and ease of use with most common use of sound and vibration software.
How does it work?
MFPA-VVS integrates a bank of programmable filters before the pre-amplification stage of the traditional MFPA. The filtering stage (2 high-pass and 2 low-pass filters) compensates for the natural frequency-dependent sensitivity of particle velocity sensors, achieving a broadband correction at the output of the MFPA-VVS for the entire frequency range. The corner frequencies of the filters can be adjusted by the manufacturer every time the sensor (VVS source) is calibrated. Please be aware that the MFPA-VVS has to be exclusively used with one single volume velocity source, and therefore this pre-amplifier is not interchangeable.
Specifications
| Performance | |
|---|---|
| Frequency range | 300 - 12.000Hz |
| Omni-directionality (±2 dB) | 300 - 6.000 Hz |
| Omni-directionality (±4 dB) | 300 - 12.000 Hz |
| Sound power level | 107 dB re 1 pW |
| Sound pressure level @1 m | 96 dB re 20 uPa |
| Input signal nominal | 0 dBV (1 Vrms) |
| Physical | |
|---|---|
| Sound source (diameter , length) | ∅ 20 cm , 9.5 cm |
| Hose (diameter , length) | ∅ 4.4 cm , 300 cm |
| Nozzle (diameter , length) | ∅ 1.4 cm , 9 cm |
| Material | Black anodized aluminum |
Low frequency VVS
Panel Noise Contribution