Modal analysis and intensity of acoustic radiation of the kettledrum.
The acoustical features of kettledrums have been analyzed by means of modal analysis and acoustic radiation (p/v 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 v/F 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.
Tronchin
Lamberto
L
DIENCA-CIARM, University of Bologna, Viale Risorgimento, 2, I-40136 Bologna, Italy. tronchin@ciarm.ing.unibo.it
D000162:Acoustics; D006801:Humans; D008144:Loudness Perception; D009146:Music; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography; D014732:Vibration