Impact of free field inhomogenity on directivity measurements due to the measurement set-up

Malte Koba and Alexis Baskindb

aDetmold University of Music
balexis baskind music production

Saturday, September 14, 2019 from 13:20 to 13:40

in Summer Theater

Abstract :
Measurements in anechoic conditions are affected by the measurement set-up itself. The presence of grids, stands, turntables and the human body introduces reflections, diffraction, absorption and more changes to the ideally free field conditions. The impact of such equipment on directivity measurements is often neglected, and artefacts are are easily mis-interpreted as features of the source directivity. In an anechoic chamber several setups are compared with respect to changes in the measured directivity of a simplified musical instrument. The differences of the 1/r amplitude decay as well as the resulting directivities are presented and discussed.

ICS file for iCal / Outlook

[ Close ]