Hello! This is Mario from ODEON. In this video, we will talk about
the Compare and Average tool, which was introduced in ODEON 18. The compare and average tool allows you
to load various multi-point responses in a single interface. This allows you to see the results
from different jobs side to side. And it will also calculate statistics,
such as averages and standard deviations, for the loaded multi-point responses. With this tool you can, for example, study the influence of different source
positions at the same receiver positions. You can also average room acoustic parameters calculated with multiple source positions, as recommended by international
standards such as ISO 3382. The compare and average tool even allows
you to compare jobs from different models. So, if you have two models where materials or geometries
were modified on one of them, you can showcase the effect of these changes. You can even compare 2
completely unrelated models. There are various ways to access t
his tool. The simplest is to go to the Job list, and click on this icon. This will compare and average all
currently calculated multi-point responses. Here you have the 3D Receivers tab. In this tab, you can select
and save receiver groups, in the same way as normal multi-point responses. This is explained in our video on
multi & single point responses. Next is the Case List tab. This will list all multi-point responses
loaded into the compare & average tool, with their properties in differe
nt columns. If you wish to exclude some jobs from the results, you can disable them by
unticking these checkboxes. You can then see the results in
the energy parameter bars tabs. Just like in a normal point response, the first one shows the frequency
dependent parameters per octave band. Each color corresponds to a different job. Right now, each bar shows the
average of all receivers in that job. The black line then shows the average
of all jobs at that octave band. However, you can scroll
through
receivers with R and Shift+R. And as usual across the software, you can scroll through parameters
with the left and right arrows. The second energy parameter bars
tab shows the broadband parameters. Here, the results are shown at
individual receivers by default. The black dotted line is the average of
all jobs at a single receiver position. While the solid black line is the average
across all jobs and all receiver positions. The legends for the jobs can be
customized back in the C
ase List tab. You can manually change the legends by double clicking on any row
under the “Edit legend” column. You can also copy different
properties of the jobs into the legend with the buttons at the bottom of the window. You can apply this to the currently selected row, or to all rows by ticking this checkbox. Now, let’s go to the receiver statistics tab. This shows the average, minimum, maximum,
and standard deviation for all results. Remember that these statistics are not
only across r
eceivers but also across jobs. Finally, we have the Energy Parameters tab. This shows the results
numerically arranged in tables. You can scroll down for
different groupings of data, or skip to different sections with these buttons. You can also compare and average two jobs by dragging and dropping a calculated
multi-point response into another. This even works across two different ODEON models, allowing you to compare
results between the two models. To do this, you will need to open a
sepa
rate ODEON window, by going to File, then “Open another instance of ODEON”. Then, open the 2nd model in the second window. Finally, drag and drop a job
from one model into the other. However, receiver-specific
results will only be available if the two models have
receivers at the same positions. If you have different receiver
positions between the two models, some displays will be unavailable. For example, you will be unable
to define receiver groups, since there are no common
receivers be
tween the two models. And results in the energy parameter
bars and energy parameter tables will all be averages across all receivers, without the possibility of looking
at results at specific receivers. To make sure you have the same
receiver positions between models, you can either make a copy of the
model and edit the second model, or you can export the source/receiver script, which we explain in our tutorial on sources. You can also compare more than 2 models at a time. Simply open yet an
other model, and drag and drop the multi-point response
into the compare and average window. By default, ODEON comes with 11 European
Concert Hall models grouped in a folder. So, we can try to make a
comparison of all 11 concert halls. With that, we conclude this tutorial, and
we hope you have found it useful. Good luck!
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