detektor

Earlier prototypes of the detector were used to make most of the recordings here:

See also: http://algorhythmics.ixdm.ch/?p=159

The detektor available here finalises and tidies up the design, also adding adjustable attenuation to the high frequency part of the circuit.

Either low or high frequency signals can be monitored from the headphone socket (with antenna at top and sockets right this is the top minijack socket), with one switch (lower right) selecting low or high frequency domain. Both signals can be recorded as a stereo pair from the other (lower) socket. Low frequency signals are primarily in the magnetic field domain, so the coil (black object top left) needs to be placed quite close to the emitting object (for example, any electronic device such as a mobile phone, bank machine, digital recorder, monitor, LCD and so on). The antenna for high frequency signals is located top right and can barely be seen under the black soldermask layer. It should not be touched or covered with the hand as this will effect signal strength. The antenna will receive signals covering large distances and heavily effected by reflections and other effects from surrounding buildings, bodies and infrastructure.

The bottom left knob/potentiometer adjusts headphone volume. The top right knob controls attenuation of the high frequency signal.

The detektor is powered by three AAA batteries installed on the back of the unit. The power switch is in the middle of the unit.

The Detektors project has been featured in "The Routledge Companion to Music, Technology, and Education", and "The Oxford Handbook of Algorithmic Music" amongst others.

Mapping the electomagnetism detektors by Martin Howse and Shintaro Miyazaki/

Detektors. Rhythms of Electromagnetic Emissions their Psychogeophysics and Micrological Auscultation