icroflown Technologies - DTA
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Datasheet icroflown Technologies Charting sound fields Impedance setup Microflown offers now a complete solution to measure your material properties in situ. The properties like acoustic absorption, acoustic reflection or impedance can be measured in just a few minutes, broad banded and under normal and oblique angles. This with a small, handheld impedance gun. A complete and easy to deploy hard and software solution is offered. The possibility to measure both sound pressure and acoustic particle velocity in situ right at a surface of a material has created a true alternative to the well known Kundt's tube method or reverberant type of measurements. Taking (destructive) samples is no longer required, and also the absorption of sound waves under oblique angles of incidence, as they occur in practice of course, can finally be tested. Extremely high spatial resolution allows analysis of inhomogeneous, e.g. perforated, materials. As the in situ method also works with a relative movement between sample and probe, the end of line manufacturing control of damping materials has become possible. V1.0 2009-06 As the method also works on curved materials, also the quality of the acoustic package as applied in the final assembly lines can be tested. A new era on quality control has only just begun, triggered by this novel and easy to use in situ surface impedance method. The product consists of: PU probe Spherical loudspeaker setup 2 Channel signal conditioner 2 Channel DAQ Software Cabling ü ü ü ü ü ü Typical applications ü ü ü Impedance measurements Absorption measurements Reflection measurements Datasheet - Impedance setup Page 1 icroflown Technologies
Transcript of icroflown Technologies - DTA
Datasheet
icroflown TechnologiesCharting sound fields
Impedance setup Microflown offers now a complete solution to measure your material properties in situ. The properties like acoustic absorption, acoustic reflection or impedance can be measured in just a few minutes, broad banded and under normal and oblique angles. This with a small, handheld impedance gun. A complete and easy to deploy hard and software solution is offered.
The possibility to measure both sound pressure and acoustic particle velocity in situ right at a surface of a material has created a true alternative to the well known Kundt's tube method or reverberant type of measurements.Taking (destructive) samples is no longer required, and also the absorption of sound waves under oblique angles of incidence, as they occur in practice of course, can finally be tested. Extremely high spatial resolution allows analysis of inhomogeneous, e.g. perforated, materials.As the in situ method also works with a relative movement between sample and probe, the end of line manufacturing control of damping materials has become possible.
V1.0 2009-06
As the method also works on curved materials, also the quality of the acoustic package as applied in the final assembly lines can be tested. A new era on quality control has only just begun, triggered by this novel and easy to use in situ surface impedance method.
The product consists of:PU probeSpherical loudspeaker setup2 Channel signal conditioner2 Channel DAQSoftwareCabling
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Typical applications
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Impedance measurements
Absorption measurements
Reflection measurements
Datasheet - Impedance setup Page 1 icroflownTechnologies
Datasheet - Impedance setup Page 2 icroflownTechnologies
Application features
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300Hz - 20kHzFree fieldNormal and oblique angles of incidenceFlat and curved surfacesHomogeneous and inhomogeneous materialsFixed and moving surfacesCan be used for- Product development- End of line control
- After manufacturing- After assembly
Specifications - Hardware - Impedance Gun
The impedance gun is designed to decouple the PU probe and the speherical loudspeaker, and still keep it as one hand held device. The distance between both is a known fixed distance.
Speaker specs:Frequency response: 80Hz -20kHzImpedance: 8 OhmDiameter: 12,4 cmWeight: 480gS/N: >95dBMax SPL: 111 dB
Specifications - Hardware - Signal conditioning and DAQ
The system comes along with the MFSC-2 and MFDAQ-2. The MFSC-2 is a 2 channel signal conditioner used to power en readout the microflown sensor. The PU probe has 2 outputs, pressure (P) and particle velocity (U). The MFDAQ-2 is a 2 channel data acquisition system that reads in two analogue channels. The inputs of the DAQ are 2 standard BNC connectors. The out put connection to the computer is a trough USB.More info and specs can be found in the datasheet and manual of the and
MFSC-2MFDAQ-2
Specifications - Software
The surface impedance software is an MATLAB executable. The software is
. One free field calibration measurement
. After measuring the result can be shown within seconds. All relevant data like absorpion, reflection and impedance can be plotted quickly.
an usefull tool to quickly analyse the Acous t i c p r ope r t i e s o f bo th homogeneous and inhomogeneous materials
before the actual measurement is also performed
The following functions are measured and displayed:
AbsorptionReflection - RealReflection - ImaginaryReflection - MagnitudeReflection - PhaseImpedance - MagnitudeImpedance - PhaseCoherenceTransfer functions between P and UPower spectral density
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Mean screen of the impedance software Example of a absorpion curve plot
Microflown Technologies, PO Box 2205, 6802 CE Arnhem, The Netherlands
W: www.microflown.com E: [email protected] T: +31 088 0010800 F: +31 088 0010810
