Spectral Properties of Orchestral Instruments Measured in the Concert Hall of a Public School

This paper presents the spectra of several orchestral instruments measured in the concert hall of the Liceo Statale “Alfano I” in Salerno, Italy. For each musical instrument used the variations of frequency of average signal unweighted (LZeq average) relative to the C diatonic major scale are shown in ascending and descending order. In this study the notes played by eight instruments (flute, trumpet, bass tuba, drums, violin, horn, piano and tenor sax) in an acoustically correct room are measured using a class A phonometer from wich frequencies are derived. The most important data relating to performances of each instrument were processed in order to provide a useful data base both for designers who deal with predictive analysis for the acoustic design of concert halls and those who digitally simulate sounds produced by orchestral instruments. Key-Words: Acoustical Measurements, Musical Instruments, Spectra Analysis, Diatonic Major Scale