Volume 117, Issue 2, February 2005
Index of content:
- MUSIC AND MUSICAL INSTRUMENTS 
117(2005); http://dx.doi.org/10.1121/1.1828552View Description Hide Description
The acoustical features of kettledrums have been analyzed by means of modal analysis and acoustic radiation ratio) measurements.Modal analysis of two different kettledrums was undertaken, exciting the system both by a hammer and a shaker. Up to 15 vibrational modes were clearly identified. Acoustic radiation was studied using two ways. Based on previous experiments of other researchers, a new parameter, called intensity of acoustic radiation (IAR), has been defined and measured. Results show a strict relationship between IAR and the frequency response function (FRF, which is the ratio), and IAR also strongly relates the modal pattern to acoustic radiation. Finally, IAR is proposed for vibro-acoustical characterization of kettledrums and other musical instruments such as strings, pianos, and harpsichords.