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Förenklad akustiksimulering för interaktiv miljö
2012 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

This thesis is created in collaboration with iOpera AB in Kramfors. iOpera is a company that is currently working on a project involving virtual musical theater on the internet. The vision is to create a greater interest in opera because opera hasn’t got so much attention in the new music industry involving the internet.This project is about helping iOpera with the acoustic simulations, because the acoustics of the virtual environment is very important to add more value into the iOpera-project.With help of the computer software CATT-Acoustic the acoustics of a model can be simulate. Because the simulations in this project shall be in an interactive environment, that will say that the visitors will be able to switch places in a room, it will take a lot of data, and therefore it´s important to use simplifications in order to save computer power and time. Two types of simulations are used in this project, one fast simulation where only the response on the early reflections was calculated using the "image-source method". And one full simulation where the entire response with direct sound, early reflections and late reflections was calculated with CATTs hybrid model RTC. The simulations were made in two separate rooms, LTU's auditorium and one of LTU's classrooms, and five different positions were created in both rooms. An artificial tail based on the room reverberation was created and then added into the early-response-simulation to generate a matching reverberation. A listening test was made to see if the simplified method would work by compare the full simulation and the simplified simulation. The test was made on 12 subjects and consisted of two parts. The first part was to grade from 0-10 how well they thought the clips they were hearing was consistent with the acoustics in a concert hall and a classroom. The second part, they got a drawing of each room and they had to place themselves wherever they thought they were. The listening test showed that the simplified simulation was similar to the full simulation on some points. The location of the sound source to the left and right was similar in both simulations and Aula Aurora gave the simplified simulation and the full simulation the same feeling of sitting in a concert hall. If you were placed in the front or back of the room is generally quite difficult to determine, and it was very different opinions from the subjects. However, it was equally spread in both simulations, especially in the Auditorium. One thing that turned out to be not so good was the feeling of sitting in a classroom. The similarities still shows that you can with help of simplifying the simulation creating a acoustic feeling for the audience that matches consistent with the full simulation.

Place, publisher, year, edition, pages
Keyword [en]
Keyword [sv]
Teknik, Akustik, Akustiksimulering, Rumsakustik, iOpera
URN: urn:nbn:se:ltu:diva-55644Local ID: c7be304b-6169-436b-8244-2dc75367f318OAI: diva2:1029028
Subject / course
Student thesis, at least 15 credits
Educational program
Arenaprogrammes (2002-2014)
Validerat; 20120329 (anonymous)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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Axelsson, Björn

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