www.odeon.dk
Newsletter - November 2011


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Please let us know, what you think
ODEON is used worldwide by a large range of customers handling acoustics, noise and soundscapes - indoors and outdoors. You are one of over six thousand people who have created an account on odeon.dk.

We hope you will use one minute to complete our questionnaire and help us decide how we should focus future development of ODEON and improve our services.

Questionaire







Version 11 was released in August 2011
We proudly present ODEON version 11, with tremendous increased calculation speed as well as customization of acoustic parameters to fulfil your needs.

Introduction of the Fibonacci spiral makes version 11 twice as fast as version 10 because less rays are needed to obtain the same quality in the result.

The new parallel processing makes version 11 an additional five times faster than version 10 using a multicore computer (4 cores/ 8 threads).

Room Acoustic Parameter list intro In version 11, you decide which room acoustic parameters you want to look at in your result. This is specified in the new Room Acoustic Parameter List.  

Using the new Room Acoustic Parameter List you can also:

Note!
A service release of version 11.10 is available for download with fixes and enhancements.


Acoustics of Ancient Theatres
 
ODEON model from Iannace, Maffei, Alletta paper The ODEON software is successfully used to recreate ancient theatre acoustics worldwide. The software have repeatedly demonstrated its quality for these types of partly open spaces in research projects. 

Several papers are available from the Acoustics of Ancient Theatres conference in Patras. We recommend you to take a look at these five papers:

PA/VA in urban areas
In Japan comprehensive public address (PA) systems are used for delivering daily messages in urban areas. These PA systems are also very importantly used for disaster prevention serving as voice alarm (VA) systems. Students and professors of the Chiba Institute of Technology have presented convincing research results - comparing measured impulse responses from PA systems with ODEON simulations.

PA/VA system in urban areas Publication: J Mori, D Yoshino, S Satoh, H Tachibana. "Prediction of outdoor sound propagation by applying geometrical sound simulation technique". Internoise, Osaka, Japan. Sept. 2011.


Download the conference presentation in PDF format. For comments double click on the speech bubbles in the top right corner of the presentation slide. The presentation gives valuable input as to what level of detail is needed in the geometrical model to achieve optimum quality in results.


Algorithm - Construction, Part 5, 2009
Part 5, 2009 Diffraction around edges enables ODEON to predict sound diffraction around up to two edges. Edge diffraction is important in outdoor spaces where the sound is influenced more by direct sound level and by diffracted sound.

Algorithm Architecture

Retrieve previous described development from former newsletters (grey bricks in the house):

Part 1, 2005: Reflection Based Scattering
Part 2, 1984-1995: Ray tracing, Vector Based Scattering and Secondary Source Method
Part 3, 2000: Angle Dependent Absorption
Part 4, 2000: Early Scattered Rays


In this newsletter
-ODEON questionnaire

-Version 11 is released

-Ancient theatres

-PA/VA in urban areas

-Algorithms, Part 5

Download
ODEON version 11.10

SU2Odeon version 1.03

Calender
 
2012
April
ODEON
Course
Nærum
Denmark
May
Acoustics
2012
Hong Kong
China
June
EuroNoise Prague
Czech Rep.
August
InterNoise New York
USA
   
Full event calender


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