„Das Blumlein-Pfanzagl-Triple - Theorie und Erfahrungen im Praxistest“

Thesis

Based on the well-known ‘Blumlein-Pair’, it is the aim of this project to find a compact microphone system – well suited for mobile applications – which delivers signals for the three front-channels of a 5.1 surround recording with appropriate channel separation.

Most of the commonly used 5.1 surround microphone systems are characterized by either relatively large capsule spacings (see OCT, various ‘Tree’-techniques, as well as the ‘Microphone curtain’, etc.), or relevant weight (see Schoeps ‘KFM-Kugelflaechenmikrofon’ or Holophone ‘H2-Pro’), which makes them non-ideal for easy-to-install or mobile applications (as camera-microphones or on the boom-pole).

The ‘Blumlein-Pfanzagl-Triple’ (BPT) microphone is proposed for the – ideally - localization-error free recording of small sound sources with complex (i.e.frequency dependent) radiation characteristics. In practical use it has turned out to be very well suited also for the recording of large sound sources (e.g. symphony orchestra), especially as a so-called ‘centerfill-microphone’ in combination with large-AB microphone systems.