Mid-High Frequency VVS

The mid-high frequency volume velocity source, MHVVS, is completely redesigned to deliver a final product that on 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.

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This omni-directional noise 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 ensuring the best performance going hand in hand with a user-friendly experience.

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 optimise, troubleshoot and validate sound packages, from BIW, prototype to 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 behaviour 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.

Features include:

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
Component vibroacoustic behaviour characterisation

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

Microflown Mid-High Frequency VVS Datasheet