Microclimate conditions in the SS. Salvatore Church of Bologna

This paper analyses the microclimate conditions in the Church of Santissimo Salvatore in Bologna and their influence on the acoustics of the Church and the sound of the pipe organ. It is well knowing that the variation of air temperature, median radiant temperature, relative and absolute humidity could provoke thermal expansions of metals which are used for the organ pipes. This paper analyses a monitoring campaign which lasted one year in which temperature and relative humidity were stored with a data logger. Moreover, the paper shows the effect in the variation of the microclimate conditions in the church by simulating different number of people in the church and different thermal conditions outdoor. Finally, the paper reports the variations of the acoustic parameters simulating the new values of temperature, relative humidity and air velocity.