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Author(s): António Pedro O. Carvalho
Title: BACH, a new binaural room acoustical measure
Issue Date: 1994
Abstract: This study reports on acoustical field measurements made in a major survey of 41 Catholic churchesin Portugal built in the last fourteen centuries. Binaural measurements were taken in each church using a dualchannel real time frequency analyzer to calculate the coherence values between the signals at both ears in 1/3octave frequency bands. From the coherence values a new binaural acoustical measure was developed andcalled BACH (Binaural Acoustical CoHerence). Monaural acoustical measurements were also taken atseveral source/receiver locations using the impulse response method. BACH was shown to be an orthogonalparameter in statistical tests with nine other monaural acoustical measures (RT, EDT, C80, D, TS, L,BR_RT, BR_L and RASTI) and fifteen architectural parameters. Information was collected regarding thequality of music in each church. ANOVA tests were performed to examine the significance of the differencesamong the groups of equal subjective quality ratings. The author wanted to test the hypothesis that this newbinaural acoustical measure can be useful in estimating the general subjective quality of churches regardingmusic. A linear correlation coefficient near 0.7 was found between the BACH and the subjective qualityratings that supported the stated hypothesis. This is exploratory research and developments are being tested toimprove the model.
Subject: Acústica, Engenharia civil
Acoustics, Civil engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia civil
Engineering and technology::Civil engineering
Source: 128th ASA Meeting
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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