Reverberation in Grundtvigs Church

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The complicated room acoustics of cathedrals and mosques are presented with ease by the auralisation methods used in ODEON. This example takes you to three different spots in a model of the Grundtvigs Church – a large cathedral in the northern part of Copenhagen, Denmark. The dimensions of the church are approximately (L x W x H) = (63 x 30 x 20) metres and the overall reverberation time ranges from 12.5 seconds at 63 Hz to 1.4 seconds at 8 kHz.

In the auralisations below, there are two groups of sources. Group 1 is the four left-most sources, while group 2 is the four sources in the middle. Each auralisation only has one group active at a time.

Anechoic source signal

Layout

Anechoic source signal

Guillaume de Machaut: "Kyrie"

Layout

View from receiver

Demo sound

Group 1, receiver 1

View from receiver

Demo sound

Group 1, receiver 3

View from receiver

Demo sound

Group 1, receiver 4

View from receiver

Demo sound

Group 2, receiver 2

View from receiver

Demo sound

Group 2, receiver 3

View from receiver

Demo sound

Group 2, receiver 5

View from receiver

Below you may download an ODEON zip archive for the above example, which is a packaged ODEON model (for ODEON 15.15 Auditorium or Combined) containing all the necessary files to run it: material list, geometry, source and receiver placements, etc. ODEON zip archives may also contain the calculated jobs, however, the file below does not include the calculated jobs. You may find ODEON zip archives for other examples here.

To unzip an ODEON zip file:

Launch ODEON
Go to File > Zip > Unzip archive
Select your downloaded ODEON zip file
Select a folder to extract the files

ODEON will then automatically load the room.

ODEON zip file download

Room: Grundtvigs Church. Anechoic recording: Guillaume de Machaut: “Kyrie”, produced by the University of Bologna.

Below are some older, additional auralisations, where a bassoon duo is simulated using a two track recording and simulating two sources in the church. In these examples, all receivers are directed towards the altar and the source, and it is easy to notice the long reverberation time.

Anechoic source signal

Layout

Anechoic source signal

Basoon duo

Layout

Demo sounds

View from receiver

Demo sound

R1, close to sources

View from receiver

Demo sound

R2, no direct sound

View from receiver

Demo sound

R3, rear part