MEASURING MUSICAL INSTRUMENTS DIRECTIVITY PATTERNS WITH SCANNING TECHNIQUES
Daniel Fernández Comesaña, Takashi Takeuchi, Sandra Morales Cervera, Keith Holland · 2012
Characterizing directivity patterns of musical instruments implicitly requires measuring nonstationary sound fields. A priori, this fact implies using multichannel methods to assess any change along time at all regarded positions. However, this paper explores the advantages of using a static reference sensor close to the musical instrument to track any variations in the sound field during the measurement, allowing scanning techniques to be performed. The method developed is based on taking transfer functions between the scanning transducer and the reference sensor. Then, the number of positions measured is limited for each frequency depending on the dynamic range acquired. Experimental results of violin directivity patterns are presented along with a discussion focused on comparing the technique proposed with conventional multichannel measurement methods.