Approximately 30 dB more sensitive than common pickup coils
VLF radio band reception: sferics, whistlers and other atmospheric events
Custom-wound heptagonal 333-turn coil
Professional XLR-3M output
Open-source design (CC BY-NC-SA)
Priezor is an open-source passive magnetic antenna for electromagnetic listening. It is very sensitive and capable of capturing faint atmospheric events in the VLF radio bands (sferics, whistlers). Compared with Elektrosluch sensors it is less directional and focused, which makes it more useful for recording ambient electromagnetic fields where the overall “sound of the place” is desired.
Priezor is about 30 dB (≈31.6×) more sensitive than common pickup coils (measured at 1 kHz). For recording VLF (“natural radio”) it performs best with a low-noise microphone preamplifier with at least 70 dB of gain (for example Sound Devices MixPre-3).
