Williams curves

The Williams curves (after Michael Williams) enable the determination of which microphone base a and which axis angle α lead to which usable recording area.

A maximum level difference of 15 dB and a maximum transit time difference of 1.21 ms is assumed for the localization from the direction of a stereo loudspeaker. These values ​​were found empirically by clicking Marracas and speech signals in an anechoic room. The shorter the click signals, the smaller the values ​​found appear.

literature

• Thomas Görne: Microphones in theory and practice. 8th edition, Elektor-Verlag, Aachen, 2007, ISBN 978-3-89576-189-8

Web links

• Recording range curves according to Sengpiel (PDF file; 283 kB)

Individual evidence

1. ^ Gert Simonsen: Diploma thesis . Carried out at the Technical University of Denmark, Lyngby, 1984