Publications
Impedance measurements
In-situ method
- Spatial variation of impedance and intensity measured close to a sample in the near field of a spherical sound source (PDF)
Published at the SAPEM, 2011, Emiel Tijs, Erik Druyvesteyn - A Comparison of Three Methods to Calculate the Surface Impedance and Absorption Coefficient from Measurements Under Free Field or in situ Conditions (PDF)
Published at the ACTA ACUSTICA UNITED WITH ACUSTICA, Eric Brandão, Emiel Tijs, Arcanjo Lenzi, Hans-Elias de Bree - Humidity effect onto measurement of ensemble averaged surface normal impedance of materials using combination of microphone and particle velocity sensor (PDF)
Published at the Internoise 2011, Asniawaty Kusno, Toru Otsuru, Reiji Tomiku, Noriko Okamoto - Outdoor measurement of sound absorption coefficient using combined particle velocity-pressure sensor – influence of wind screen (PDF)
Published at the Internoise 2011, Satoshi Sugie, Junichi Yoshimura - An in-situ technique for extensive field measurements of absorption characteristics of materials by using ensemble averaging (PDF)
Published at the ICA 2010 Sydney,Nazli bin Che Din, Toru Otsuru, Reiji Tomiku, Noriko Okamoto, Asniawaty Kusno - Acoustical diagnosis of concrete crack depth based on its resonance (PDF)
Published at the ICA 2010 Sydney, Teruo Iwase, Yuta Horiguchi, Hirohito Yasuoka - High resolution absorption mapping with a pu surface impedance method (PDF)
Published at the ASA NoiseCon 2010, E. Tijs, H-E de Bree, E. Brandao - Scan & Paint: a novel sound visualization technique (PDF)
Published at the Internoise 2010, H-E de Bree, E. Tijs, S. Steltenpool - Untersuchungen zur Erfassung von Absorption bei gekoppelten Fluid/Struktur-Analysen von Gesamtkraftfahrzeugmodellen (PDF)
Published at the VDI Tagung 2010, C. Schedlinski - Ensemble averaged surface normal impedance of material using an in-situ technique: Preliminary study using boundary element method (PDF)
Published at the JASA 2009, T. Otsuru - An in situ method to measurement the acoustic absorption of roads whilst driving (PDF)
Published at the DAGA 2009, E. Tijs, H-E de Bree - Large scale in situ acoustic absorption measurements in a theatre (PDF)
Published at the DAGA 2009, E. Tijs, H-E de Bree, E. Brandao - PU probe based in situ impedance measurements of a slotted panel absorber (PDF)
Published at the ICSV16, E. Brandao, E. Tijs, H-E de Bree - In-situ measurement method of ensemble averaged impedance and absorption characteristics of materials at field incidence using p-v or p-p sensors (PDF)
Published at the Internoise 2008, T. Otsuru - An Iterative Method for Determining the Surface Impedance of Acoustic Materials In Situ (PDF)
Published at the Internoise 2008, J. Alvarez, F. Jacobsen - Comparison of three measurement techniques of normal absorption coefficients in free field method using boundary element method (PDF)
Published at the Sapem 2008, K. Hirosawa, H. Nakagawa, M. Kon, A. Yamamoto - In situ PU surface impedance measurements for quality control at the end of an assembly line (PDF)
Published at the SAE NVH 2009, E. Tijs, E. Brandao, H-E de Bree - In situ tubeless impedance measurements in a car interior (PDF)
Published at the SIA Le Mans 2008, E. Tijs, E. Brandao, H-E de Bree - Computational Model Updating of Structural Damping and Acoustic Absorption for Coupled Fluid-Structure-Analyses of Passenger Cars (PDF)
Published at the ISMA 2008, C. Schedlinski, E. Tijs - Recent developments free field PU impedance technique (PDF)
Published at the Sapem 2008, E. Tijs, H-E de Bree - PU surface impedance measurements on curved liner materials in the presence of a grazing flow (PDF)
Published at the CEAS Bilbao 2008, E. Tijs, H-E de Bree, P. Ferrante, A. Scofano - Acoustic absorption measurements of moving structures and under influence of flow (PDF)
Published at the ISMA 2008, E. Tijs, H-E de Bree - A handheld device to measure the acoustic absorption in situ (poster presentation) (PDF)
Published at the SNVH Graz 2008, H-E de Bree - A study of influences of the in situ surface impedance measurement technique (2 pages DAGA version) (PDF),
A study of influences of the in situ surface impedance measurement technique (extended version) (PDF)
Published at the DAGA 2008, M. Nosko, E. Tijs, H-E de Bree - In-situ measurements of the complex acoustic impedance of materials in vehicle interiors (PDF)
Published at the ICA 2007, L. Miranda, J. Alvarez, F. Jacobsen - Non destructive and in situ acoustic testing of inhomogeneous materials (PDF)
Published at the ERF33 2007, E. Tijs - In-situ measurements of the complex acoustic impedance of porous materials (PDF)
Published at the Internoise 2007, J. Alvarez, F. Jacobsen - An ultra miniature measurement tool to measure the reflection coefficient of acoustic damping materials in situ (PDF)
Published at the SAE NVH 2007, H-E de Bree - Two complementary Microflown based methods to determine the reflection coefficient in situ (PDF)
Published at the ISMA 2006, H-E de Bree - Measuring the free field acoustic impedance and absorption coefficient of sound absorbing materials with a combined particle velocity-pressure sensor (PDF)
Published at the JASA May 2006, R. Lanoye - A practical device to determine the reflection coefficient of acoustic materials (PDF)
Published at the ISMA 2004, R. Lanoye - Broad band method to determine the normal and oblique reflection coefficient of acoustic materials (PDF)
Published at the SAE NVH 2005, H-E de Bree, R. Lanoye, S. de Cock, J. van Heck - Experience with different free field techniques to evaluate the surface impedance (PDF)
Published at the ICA18 2004, R. Lanoye - In-situ Impedanzmessung mit einem kombinierten Schnelle- und Drucksensor (PDF)
Published at the DAGA 2006, R. Kruse, V. Mellert - In situ impedance and absorption coefficient measurements compared to poro-elastic simulation in free, diffuse or semi-statistical fields using microflown p-u probes (PDF)
Published at the DAGA 2006, A. Duval - In situ measurements of acoustic impedance for car applications: influence of forming effect (PDF)
Published at the Euronoise 2006, C. Sandier - Measuring Method of Sound Reflection and Absorption Characteristics Based on the Particle Velocity and its Applications to Measurements on Such as Drainage Pavement of Road Surface (PDF)
Published at the Internoise 2003, T. Iwase - Impedance measurement of materials by use of ambient noise for computational acoustics (PDF)
Published at the Internoise 2006, T. Otsuru - Evaluation of Electro-acoustic Techniques for In-Situ Measurement of Acoustic Absorption Coefficient of Grass and Artificial Turf Surfaces (PDF)
Published at the SAE NVH 2007, N. Londhe - Study on measurements of acoustic properties of turf and typical surfaces and on characteristics of sound propagation above turf field (PDF)
Published at the Internoise 2008, T. Iwasa, K. Yoshihisa, Y. Okada - A Trial Application of In-situ Measurement Impedance to a Room Acoustic Improvement by Finite Element Sound Field Analysis (PDF)
Published at the Internoise 2008, T. Otsuru, N. Okamototo, R. Tomiku, T. Okuzonoc, K. Isobe
PU probes used in a impedance tube
- Measurement of absorption with a p-u sound intensity probe in an impedance tube (PDF)
Published at the ASA 2005, Y. Liu, F. Jacobsen - A novel technique for measuring the reflection coefficient of sound absorbing materials (PDF)
Published at the ISMA 2000, H-E de Bree - Comparison of two methods for measurement of horn input impedance (PDF)
Published at the 100th AES convention 1996, H. Schurer - On the use of a P-U sound intensity probe for the qualification of complex surface properties (PDF)
Published at the ICSV13 2006, Bonfiglio - Experiments with a new acoustic particle velocity sensor in an impedance tube (PDF)
Published at the Sensor and Actuarors A69, 1998, F. van der Eerden
Energy based method
- Measurement of sound power and absorption in reverberation chambers using energy density (PDF)
Published at the JASA, 2007, D. Nutter
Some general papers
- Een nieuwe methode voor het ter plekke meten van akoestische eigenschappen van materialen (PDF)
Published at the Geluidnieuws May 2008, T. Basten - Experimental energetic analyses of an actively controlled one-dimensional acoustic waveguide (PDF)
Published at the Applied Acoustics 2006, Donadon - Analysis of a perforated panel for the correction of low frequency resonances in medium size rooms (PDF)
Published at the Applied Acoustic 2006, A. Panteghini - Acoustic impedance measurement, Part I: a review (PDF)
Published at the Journal of sound and vibration, 2001, J-P Dalmont - Calibration of the p-u Microflown probe and some considerations on the physical nature of sound impedance (PDF)
Published at the Euronoise 2003, D. Stanzial, D. Bonsi - Comparative analysis of several acoustic impedance measurements (PDF)
J. Gonzalez Suarez, 2002 - The concept of 3-D acoustic resistance and its evaluation at the open end of an organ pipe (PDF)
Published at the SMAC 2003, D. Stanzial, D. Bonsi - In situ acoustic impedance measurement using abient noise (PDF)
T. Otsuru - Input impedance of brass instruments with velocity measurements (PDF)
D. Ludwigsen - A method for measurement of the vocal tract impedance at the Mouth (PDF)
Medical Engineering & Physics 2002, M. Kob
Library
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Videos
- Acoustic Camera | Introduction
- Scan & Paint | Introduction
- Microflown: a new type of sensors
- Microflown PU based Acoustic Camera
- Microflown: background noise reduction
- Scan & Paint Intensity
- Scan & Paint impedance
- Microflown PU based Source Path Contribution Analysis
- Cabin Interior Noise Analysis - Case PCL Swidnik
- Microflown PU based in situ impedance
- Microflown HVAC testin NVH
- Microflown Acoustic Eyes
- Microflown Acoustic Eyes 2
- Microflown Sphere Calibration
- Short standing wave tube calibration
- Toureg engine runup
- Loudspeaker
- Loudspeaker 2
- Scan & Paint: in-situ absorption inside a car
- Presentation
- Measurement Techniques
Events
Euronoise 2012, Czech Republic - June 10-13th 2012
Prague | Czech Republic | Jun 10, 2012
SNVH 2012, Austria - June 13-15th 2012
Graz | Austria | Jun 13, 2012
Internoise 2012, USA - August 19-22th 2012
New York | USA | Aug 19, 2012
News
Newsletter | April 2012
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International Noise Awareness Day
Microflown Technologies supports the 17 th International Noise...
Newsletter | February 2012
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