Below the improvements included in Odeon Versions 10. For development before version 10.0 look in the history.

Update information in Odeon 10.1

(Release 15 Dec. 2009 )

Loudspeaker Arrays modelled in Odeon make use of CF2 directivity files in the Common Loudspeaker format. CF2 files are given in 1/3 octaves at a 5 degrees resolution. However, handling beam steered arrays with short distance between transducers or arrays with different types of transducers this resolution is not sufficient to get precise results when calculating the phase interaction between units.

The solution in Odeon 10.1 is to perform magnitude interpolation to upscale the directivity balloons to a higher frequency resolution e.g. 1/6 octave band resolution at which phase summation is carried out. Magnitude interpolation is also carried out to deal with limited angular resolutions of magnitude.

In the Array source editor of Odeon 10.1 a high resolution frequency response graph of the array loudspeaker can be displayed for any given receiver point.
This graph displays direct SPL at the high frequency resolution at which the the phase summation takes place (1/6 octaves are the default given by Odeon - higher resolution can be defined).

• In the Near field display simply double click at the point of interest in the display to open the frequency display.
• In the 3D_Direct sound plot, use the cursor (shortcut keys 1,2,3,4,5,6) and then press f to open the frequency display.

Update information in Odeon 10.02

Version 10.02 makes it possible to import a list of absorption coefficients from a speadsheet. Read more.

Update information in Odeon 10.01

Version 10.01 is made with the ability to exclude irrelevant geometry during import of .dxf or .3ds models and save calculation time for single rooms in Buildings with the use of clip-box import.

Update information in Odeon 10.0

The upgrade for Odeon 10.0 contains important new features.

Array Loudspeakers

In large open spaces it is a popular solution to use Array loudspeakers and beam steered arrays. Odeon Version 10 (Auditorium and Combined) makes it possible to model or import your own arrays and see how they interact in different rooms. Support for array loudspeakers is an important functionality making Odeon the ideal solution for integrating room acoustics and PA design.

Diffraction around edges

As Odeon is more and more used in outdoor areas or damped open plan spaces – we have implemented sound propagation around objects. Hereby a more realistic screening effect is simulated, in cases with low reverberance. The diffraction calculation detects diffracting edges automatically making the use of the screen diffraction algorithms completely transparent to the user. One and two point diffraction is supported by the methods, which were originally developed by Allan D. Pierce.

New structure in the material library

In Version 10, the materials will be listed in categories, and in such a way that each manufacturer can arrange a supply list of materials number 0-99. Every 1000 numbers have a category corresponding to Material type (e.g. gypsum, or wood). In each category the first 100 materials are reference materials including the consultant’s favourite assumptions within the category. Hereafter making room for 9 different manufactures lists. Read more

Load 2D Background drawing in Extrusion modeller

This new feature is a useful tool when creating models from existing drawings. You can scale a drawing that has been saved as a picture (multiple image formats supported) and fix it to the drawing plane in the extrusion modeller. When drawing on top of the imported drawing it is possible to zoom and scroll the drawing for accurate operation.

Ortho snap has been implemented. Ortho snap makes it easy to draw geometries dominated by horizontal and vertical lines (offices, class rooms etc.).

Layer Handling

The layer handling has been improved in the 3DView. When modelling options is turned on, only the points active in the currently active layers are displayed. This makes it significantly easier to pick points using the 3DViews modelling facilities.

Anechoic recordings of orchestra

High quality anechoic recordings from Helsinki Technical University of each orchestra member playing four different orchestra pieces will be available in Version 10. In Odeon a full symphony orchestra can be simulated by mixing auralisations of all the musical instruments. Further description here.

New Odeon editor

A new Odeon Editor makes it easier to manage large models. The editor includes facilities such as syntax highlighting and line folding.

Button that removes extreme absorption coefficients

Based on the investigation made with the Acoustical Society of Denmark on classroom acoustics in a classroom where the horizontal reflections were dominant, a new feature has been implemented limiting the used absorption coefficients to a selected range e.g. between 0,05 and 0,95. This is only to be used in special cases were 1 or 2 dimensional reflections play the dominating role in the room model and the exact absorption coefficients are not available. A case like this is described in following Report

Export area of surfaces with different absorption

From within the material overview in Quick Estimate it is now possible to export the area used of each surface material within the room - e.g. how much mineral wool should be ordered.