aMusikinstrumenten-Museum SIM PK
bBeuth Hochschule für Technik
At an abstracted level, the stringed instrument consists of a box with a neck and fastened strings. The parameter of the resonator, the material and construction features determine the sound. Therefore the acoustic measurement of instruments plays a prime role in conservation, for functional analysis and digital archiving. In this contribution an acoustical, contact-free measurement method for quantifying the transfer function of stringed instruments is presented. The method assesses the sounding body and its periphery by means of a standard acoustical impulse response measurement (AIR) in an anechoic room. As a test signal a logarithmic sweep is employed that offers a high signal to noise ratio and the ability to separate potential harmonic distortion of the electronic signal chain from the impulse response of the instrument. The measurement is compared to the hammer probe, which is the current gold standard method. AIR is an ideal tool for functional analysis, long term monitoring of instruments as well as quality control. Instruments are not subjected to mechanical stress and do not have to be prepared for play. The sonification of the impulse response allows for aural assessment and may complement as well as standardize the description of digital objects in archives.
ICS file for iCal / Outlook