Great discoveries solve problems in different, scientific fields.

Early Milestones

Acoustic Photo- and Cinematography

Early documents of the birthplace of a new technology: Acoustic Photo- and Cinematography came into beeing. Far away from mainstream of acoustic research this 'funny' application should 1994 demonstrate, how interference nets can project images (with inversive time or with non-causal, negative delays).
Time table of first acoustic images and films of the GFaI-team (german)

1994/08 First standing* acoustic image and 1996/06 first wavefield movie (english)
1996/08 First film and first images over far distances (200 Meter) (english)
1996/10 First industry attempt - Letter labeling machine (english)
1997/01 First image of a noise reflection (english)
1997/01 Car: Silencer or engine? (english)
1997/07 Dot matrix printer (film) (german)
1997/09 Images and movies of a Motorbike (german)
1997/10 Low noise of refrigerators (german)
1997/10 Video-Recorder (english)
1998/01 Aluminium roller plant (german)
1998/02 Master class violin (english)
1998/05 Berliner U-Bahn (german)
1998/07 Linescan of Trams in Berlin (german)
1998/07 Linescans of driving cars (german)
1998/08 Power drill (german)
1999/02 Stationary diesel engine (german)
1999/07 Auto-overlay between photo, acoustic film and spectral analysis- Electrical toothbrush (german)
2002/11 Flying airplains in Berlin-Tegel (german)

Two stories about acoustic imaging (english)

* The first line scan of a moving object was published by Brhl, S. and Schmitz, K.-P.: Noise Source Localization on Highspeed Trains (Transrapid) using Different Array Types. Internoise, Leuven, Belgium, August 24-26, 1993.

Nerve System as Wave Interference Network

How to understand holomorphic brain projections? Simulations of interference nets in nerve like parametrisation show well known phaenomena: mirrored maps, bursts, conjunction, zooming, movement, pain overflow or dermal projections (somatotopy). We simulate the homunculus and we find ideas for imagination and holomorphy.
Is it coincidence or providence?

Interference Models of Nerve Nets

Pulsinterferenzen im Nervensystem - NI93 (german)
Interference Circuits (german)
Burst Calculus (german)
Basic Functions of Neuron (german)
Homunculus Model (german)
Chiasma Opticum (german)
Pulse Parameters (german)
Thumb Experiment (german)
Konishi/Jeffress Circuits (german/english)
Properties of Interference Systems (german)
Was sind Interferenzschaltungen? (german)
Interference or Pool of Neurons? (english)
Interferencial EEG- Experiments (german)
Variation of background velocity in EEG-reconstruction (german)

Investigations about Interference Integral (I) Properties

Intro and Overview (german)
I: First Interference Projection 1994 (german)
I: Zoom (german)
I: Movement (german)
I: Holomorphy (german)
I: Permutation (german)
I: Conjugation (german)
I: Mirrored Maps (german)
I: Spatio-Temporal (german)
I: Over-Conditioning of Integrals (german)
I: Pain- Hypothesis in Simulation (german)
I: Quality of Projections (german)
I: Proj. into Inhomogenous Spaces (english)

I- Wave Field Simulation

Interference Wave Field Simulation (german/ english)
Reconstruction, G, 30 Chnl (german)
Reconstruction, S, 4 Chnl (german)
Delusive Projection, S, 4 Chnl (german)
Reconstruction, S, 16 Chnl (german)
Reconstruction, GFaI, 4 Chnl (german)
Reconstruction, GFaI, 30 Chnl (german)

Special Pages

Exploring Waves at Living Animals - Andrews Squid Experiments 1995 (english)
Electrostatic Mapping of Heart-EKG (german)
Interferencial EEG- Experiments (german)
Variation of background velocity in EEG-reconstruction (german)

Hard- and Software for Acoustics, Nerves and Simulation

8- and 16-Channel Recorders (english)
History and Idea of Mirrored Maps (english)
PSI-Tools Description GUI (german)
PSI-Tools Function (english)
PSI-Tools Overview (german)
PSI-Tools Helpfiles 3.12.1997 (german), 16.6.1998 (german)
Download PSI-Tools (Zip-Archive 520 kB)
How to install? (english)
Thanksgiving (german)

Related Links

Acoustic Camera Homepage
GFaI Heinz


* Heinz, G.: "Akustische Photographie", KI-Kolloquien Prof. Hamann, 5.11.1997, 17.00 Uhr, TFH Berlin-Wedding, Haus Bauwesen, Raum D-234
** Hamilton, W.R.: Theory of Systems of Rays. Transactions of the Royal Irish Academy, volume 15 (1828), pp. 69-174

Questions? Please refer to

GFaI e.V.
Dr. G. Heinz
Rudower Chaussee 30
D-12489 Berlin

File created sept. 30, 1995
Permanent revision / redesign.

Please send a mail, if you don't understand the things. Also, if the english translation occures terrible. Sorry for the german english.

This page can be found at

Please remove bookmarks to old entry points.