Theatro Treze de Maio

The theatre Treze de Maio, in Santa Maria, Brazil, is the city’s main theater, which was studied for an Acoustic Engineering bachelor’s thesis from the Federal University of Santa Maria, in Brazil. Fifty-five receivers were measured by the students and then 20 of them were simulated in ODEON.

As the absorption coefficents were not known, the Genetic material optimizer tool was used in order to tune the model with the measurement. An investigation of the simulation parameters was done as well.

The multi source auralisation is based on recordings by the University of Bologna, as described by this paper. The instruments were recorded in a silent room with 12 microphones, to match playback from a dodecahedral speaker. The auralisations were produced with the tracks recorded from the microphone at -10.8º elevation and 0º azimuth.

The auralisations were made for 5 audience positions (blue dots) as shown further below just before the auralisations.

Photo by Ricardo Gomes

Measurement setup in the theatre. The orange-colored objects are microphone holders.

Genetic material optimization used for this simulation.

Examples of simulated room acoustic parameters compared to the real measured values.

Convergence study in function of the number of rays.

Grid responses. The simulated parameter is specified at the top of the colorbar.

Sketchup model of the Treze de Maio theatre.

Source and receiver positions for the auralisation.

Anechoic recording
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G. Verdi: "Di tale amor, che dirsi"
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Conductor position
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Audience position 1
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Audience position 2
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Audience position 3
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Audience position 4
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Audience position 5
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