In-situ Absorption

In-situ method

On the accuracy of the sound absorption measurement with an impedance gun
Published in Applied Acoustics (Vol. 158) 2020, Antonio Pedrero María, Ángeles Navacerrada, Daniel de la Prida, Luzis Iglesias, Alexander Díaz-Chyla.
In Situ Measurement of the Absorption Coefficient Based on a Time-Domain Subtraction Technique with a Particle Velocity TransducerTechnique with a Particle Velocity Transducer
Published in ACTA ACUSTICA UNITED WITH ACUSTICA (Vol. 102) 2016, Wang-Lin Lin, Chuan-Xing Bi, Michael Vorländer, Yong-Bin Zhang, Robertus Opdam, pp. 945 – 954.
Numerical study of an in-situ technique for measuring surface impedance and reflection coefficient of a locally reacting material with pressure-velocity probes
Published at NoiseCon 2016, Graciano Carrillo Pousa, Dani Fernandez Comesana, David Perez Cabo and Andrés Prieto
Automotive materials: an experimental investigation of an engine bay acoustic performances
Published in Energy Procedia (Vol. 101, 2016), Daniela Siano, Massimo Viscardi, M. A. Panza
Experimental and numerical validation of an automotive subsystem through the employment of FEM/BEM approaches
Published in Energy Procedia (Vol. 82, 2015), Daniela Siano, Massimo Viscardi, Roberto Aiello
Sound absorption measurement of road surface with in situ technology
Published at the Applied Acoustics 88, Mingliang Li, Wim van Keulen, Emiel Tijs, Martin van de Ven, André Molenaar
Indirect Measurement of the Bulk Properties of Acoustic Absorbing Samples
Published at the Acta Acustica united with Acustica. Volume 99 numer 6. November / December 2013, pp. 997-1007(11), E.HG. Tijs, W.F. Druyvesteyn
Differences between the PU and reverberant room method_Microflown
Published at the ICA Montreal in 2013, Emiel Tijs
A high sound pressure level in situ impedance measurement set-up
Presented at the Sensor & Test 2013
An Intensity Method for Measuring Absorption Properties in situ
Published at the ACTA ACUSTICA UNITED WITH ACUSTICA in 2012, Emiel Tijs, Erik Druyvesteyn
SOUND SOURCE CHARACTERIZATION FOR PU BASED IN SITU ABSORPTION MEASUREMENTS
Published at the Euronoise 2012, Prague, Emiel Tijs
Spatial variation of impedance and intensity measured close to a sample in the near field of a spherical sound source
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
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
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
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
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
Published at the ICA 2010 Sydney, Teruo Iwase, Yuta Horiguchi, Hirohito Yasuoka
High resolution absorption mapping with a pu surface impedance method
Published at the ASA NoiseCon 2010, E. Tijs, H-E de Bree, E. Brandao
Scan & Paint: a novel sound visualization technique
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
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
Published at the JASA 2009, T. Otsuru
An in situ method to measurement the acoustic absorption of roads whilst driving
Published at the DAGA 2009, E. Tijs, H-E de Bree
Large scale in situ acoustic absorption measurements in a theatre
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
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
Published at the Internoise 2008, T. Otsuru
An Iterative Method for Determining the Surface Impedance of Acoustic Materials In Situ
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
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
Published at the SAE NVH 2009, E. Tijs, E. Brandao, H-E de Bree
In situ tubeless impedance measurements in a car interior
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
Published at the ISMA 2008, C. Schedlinski, E. Tijs
Recent developments free field PU impedance technique
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
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
Published at the ISMA 2008, E. Tijs, H-E de Bree
A handheld device to measure the acoustic absorption in situ (poster presentation)
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) ,
A study of influences of the in situ surface impedance measurement technique (extended version)
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
Published at the ICA 2007, L. Miranda, J. Alvarez, F. Jacobsen
Non destructive and in situ acoustic testing of inhomogeneous materials
Published at the ERF33 2007, E. Tijs
In-situ measurements of the complex acoustic impedance of porous materials
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
Published at the SAE NVH 2007, H-E de Bree
Two complementary Microflown based methods to determine the reflection coefficient in situ
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
Published at the JASA May 2006, R. Lanoye
A practical device to determine the reflection coefficient of acoustic materials
Published at the ISMA 2004, R. Lanoye
Broad band method to determine the normal and oblique reflection coefficient of acoustic materials
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
Published at the ICA18 2004, R. Lanoye
In-situ Impedanzmessung mit einem kombinierten Schnelle- und Drucksensor
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
Published at the DAGA 2006, A. Duval
In situ measurements of acoustic impedance for car applications: influence of forming effect
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
Published at the Internoise 2003, T. Iwase
Impedance measurement of materials by use of ambient noise for computational acoustics
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
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
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
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
Published at the ASA 2005, Y. Liu, F. Jacobsen
A novel technique for measuring the reflection coefficient of sound absorbing materials
Published at the ISMA 2000, H-E de Bree
Comparison of two methods for measurement of horn input impedance
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
Published at the ICSV13 2006, Bonfiglio
Experiments with a new acoustic particle velocity sensor in an impedance tube
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
Published at the JASA, 2007, D. Nutter

Other related papers

Transfer path based tyre absorption tests
Published at the Acoustics 2013 in New Dehli, E. Tijs, B. Makwana, O. Peksel, S. Amarnath, D. Bekke
Een nieuwe methode voor het ter plekke meten van akoestische eigenschappen van materialen
Published at the Geluidnieuws May 2008, T. Basten
Experimental energetic analyses of an actively controlled one-dimensional acoustic waveguide
Published at the Applied Acoustics 2006, Donadon
Analysis of a perforated panel for the correction of low frequency resonances in medium size rooms
Published at the Applied Acoustic 2006, A. Panteghini
Acoustic impedance measurement, Part I: a review
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
Published at the Euronoise 2003, D. Stanzial, D. Bonsi
Comparative analysis of several acoustic impedance measurements
J. Gonzalez Suarez, 2002
The concept of 3-D acoustic resistance and its evaluation at the open end of an organ pipe
Published at the SMAC 2003, D. Stanzial, D. Bonsi
In situ acoustic impedance measurement using abient noise
T. Otsuru
Input impedance of brass instruments with velocity measurements
D. Ludwigsen
A method for measurement of the vocal tract impedance at the Mouth
Medical Engineering & Physics 2002, M. Kob