• A Comparison of two different sound intensity measurement principles,
  F. Jacobsen, HE de Bree, accepted for JASA, 2005

On the different measurement errors of PU and PP intensity probes:

• A comparison of p-p and p-u sound intensity measurement systems,
  Finn Jacobsen and Hans-Elias de Bree, ICSV11, St. Petersburg 2004

PU intensity probes can be made with only Microflowns allowing the use at high temperatures:

• A PU sound intensity probe designed for high temperature use,
  De Bree et al, SAE, 2007
• A Microflown Based Sound Pressure Microphone Suitable For Harsh Environments,
  Doekle R.Yntema, Hans-Elias de Bree, NOISE-CON 2005

3D integrated pu intensity probe

• Fully integrated three dimensional sound intensity sensor,
  Yntema et al, MEMS 2007

PP and PU intensity probes have equal performance in adverse sound fields:

• Intensity based sound power determination under adverse sound field conditions : P-P probes versus P-U probes,
  F. Jacobsen, HE de Bree, Lisabon, 2005

On calibration issues:

• Measurement of sound intensity: p-u probes versus p-p probes,
  F. Jacobsen, HE de Bree, Novem, 2005

Soundcards can be used to read out PU intensity probes:

• A low cost Intensity Probe,
  R. Raangs et al., AES Amsterdam 2001

First paper about PU intensity probes:

• A new sound intensity probe; comparison to the Bruel & Kjaer p-p probe,
  W.F. Druyvesteyn et al, J. audio Eng. Soc., Vol. 48, 2000 No. 1/2 January/February

On the visualisation of 3D intensity fields:

• IMAGE OF ACOUSTIC ENERGY FIELD RADIATED IN 3D SPACE BY ELECTRODYNAMIC LOUDSPEAKER
  S. Weyna, Proceedings of the Institute of Acoustics, 2007
• ACOUSTIC ENERGY DISTRIBUTION IN SPACE AROUND THE PIPE OUTLET,
  S. Weyna, Noise control, 2007
• IMAGE OF ACOUSTIC ENERGY FIELD RADIATED IN 3D SPACE BY ELECTRODYNAMIC LOUDSPEAKER,
  S. Weyna, ICA, 2007
• SOME COMMENTS ABOUT THE EXISTING THEORY OF SOUND WITH COMPARISON TO THE EXPERIMENTAL RESEARCH OF VECTOR EFFECTS IN REAL-LIFE ACOUSTIC NEAR FIELDS
  S. Weyna, OPEN SEMINAR ON ACOUSTIC 2006, Zakopane 2006
• Experimental 3D visualization of power flow around obstacles in real acoustic fields,
  S. Weyna, ICSV11, St. Petersburg 2004
• Acoustic flow visualization based on the particle velocity measurements,
  S. Weyna, Forum Acousticum, 2005
• Application of Microflown probe to visualization of acoustic power flow,
  S. Weyna, Polish-Scandinavian Structured Conference, 2005
• Microflown based identification of vortex shadding in the space of real acoustic flow fields,
  S. Weyna, ICSV12, Lisbon 2005

Some general papers:

• A study of sound intensity control for active noise barriers,
  Ning Han, Xiaojun Qiu, Applied acoustics, 2006
• A new acoustic measurement probe; the Microflown,
  W.F. Druyvesteyn et al., IOA London, 1999
• Sound intensity measurements with the Microflown sensor,
  H-E de Bree et al., Internoise 2004
• Use of the Microflown  Intensity Probe for evaluating the
  Influence of the Environment on the Power of an Acoustic Source,
  Davide Bonsi, Domenico Stanzial ,  18th ICA (International Congress on Acoustic), Kyoto, Japan, 4-9 April, 2004