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| Author(s): |
Iara Batista Cunha
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Civil, Arquitetura e Urbanismo |
| Defense date: | 2014-02-07 |
| Examining board members: |
Stelamaris Rolla Bertoli;
Maria Lúcia Gondim da Rosa Oiticica;
Silvia Aparecida Mikami Gonçalves Pina
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| Advisor: | Stelamaris Rolla Bertoli |
| Abstract | |
During Catholic services, speech and music are the main activities, thus, acoustical quality in the churches is essential. Currently, from the acoustic view, the understanding of words is the most important need of Catholic rites. The sound reinforcement systems (SRS) are used as a support in solving some recurring problems in these buildings, such as the difficulty for human voice to reach great distances or due to interference from urban noise in the indoor environment. This research intends to investigate the use of these systems and their influence on the acoustic response of the churches, with an emphasis on speech intelligibility. For this, three Catholic churches with different volumes, located in the city of Campinas, SP, were evaluated according to the acoustic parameters Reverberation Time (RT), Early Decay Time (EDT) and Definition (D50), in octave bands between 125 Hz and 4 kHz, and the Speech Transmission Index (STI) and Articulation Loss of Consonants (ALcons). Measurements were made by the impulse response method, through two different situations: with the test signal injected directly on the sound system and using the omnidirectional sound source. In all cases, without the use of SRS, the buildings showed unfavorable conditions for the acoustic speech understanding. The SRS revealed positive differences for intelligibility in most of the results. However, when the acoustic response of the building itself does not provide a good quality for speech understanding, the SRS was not sufficient to raise the quality of intelligibility for optimal results (AU) | |
| FAPESP's process: | 12/11570-0 - Influence of sound reinforcement systems on the acoustical quality of catholic churches |
| Grantee: | Iara Batista da Cunha |
| Support Opportunities: | Scholarships in Brazil - Master |