Intensity of Acoustic Radiation on Persian Musical Instruments

Modal analysis is often considered quite important to describe the physics of Musical Instruments and their sound radiation. Nevertheless, several authors as Wogram, Suzuki and Giordano did not find strong correlation with modal analysis, and therefore further researches were requested. A new acoustical parameter, called Intensity of Acoustic Radiation (IAR), was recently defined, and resulted very well related with mechanical vibration of sound source, being able to quantify the sound efficiency of musical Instruments In this paper the IAR was experimentally measured on Persian string musical Instruments. IAR relates mechanical vibration of surface (e.g. soundboards) and sound generation of the musical Instruments..