Detektor started the walk at the main station of Dortmund and walked via Katharinenstrasse (a street name, only pedestarian zone) to Kampfstrasse, where suddenly (04:15) the background noise and the usual BTS signal disappeared, due to an overload of a similar type as near the tv tower of Alexander Platz Berlin. As detektor walked further in direction of Dortmunder U there was almost nothing to hear. At 05:50 detektor passed through a pathway inside/under a building and left the passage at around 07:00. Towards the end of the recording, when arriving at a square in front of Dortmunder U. There were 3 BTS directly standing in front of the detektor (see video). At 07:50 the detektors HF antenna on its board was touched by a human hand, it did that for several times. Actually all the time from then to the end, when there is a signal audible.

Dortmund, Mainstation <> Dortmunder U

There is also a video of the 3 BTS.

HF recording made on corner of Zolastrasse and Linienstrasse. After a few seconds a very unusual, pure high frequency tone with few punctuations is found at a particular point in space.

HF Zolastrasse Berlin

HF detektor recorded on bench close to Volksbühne in Berlin Mitte. Much more intense pulsing of all signals compared to close-by Babylon recording.

HF Volksbühne Berlin

A very short walk, dance along my favourite spectral zone Karl-Liebknecht-Strasse. HF recording with the detektor and some varying, interesting signals.

HF Karl-Liebknecht Berlin

HF recording made with no movement, on concrete “bench” close to top of Schendelpark, Berlin Mitte. Interesting low frequency burst patterns.

HF Schendelpark

HF detektor recording made with very little movement, very close to the ground on the corner of Hirtenstrasse and Karl-Liebnecht-Str. Rich spectral ecology with mid-range frequencies.

HF Hirtenstrasse Berlin

HF recording made with very little movement, close to the ground outside the Babylon Cinema in Berlin Mitte. Interesting higher frequency pulsing after 20s.

HF Babylon Berlin