DYNAMICAL CHARACTERIZATION AND TUNING OF BELLS
This work started with the analysis of the tuning condition of the Mafra carillons bells, which form the largest surviving 18th century carillons in Europe. It is part of a multidisciplinary FCT research project in partnership with the Music Department from the Universidade Nova de Lisboa. In the framework of this project we recently performed a complete vibratory modelling on the oldest bell known in Portugal (S. Pedro de Coruche, from the XIIIth century), which was found broken, in order to study its original tuning state and simulate the original sound. We have chosen to illustrate here the main aspects of our work on the archeologic bell of Coruche, which led to convincing physically-based synthesized sounds. The result obtained were displayed during a public exhibition of the bell.
Illustration of the complete physical and dynamical analysis of the XIIIth bell from S. Pedro de Coruche. (a) The archeologic bell as it was found; (b) Reconstruction of the bell profile after careful geometric metrology; (c) Some of the vibration modes of the bell computed using the finite element method; (d) Spectrogram of the reconstructed bell sound based on physical synthesis.