![[elektromagenticky trolejbus by Tomas Halasz.jpg|500]]
*photo by Tomas Halasz*
Temporary sound installation and a performance which took place in a trolleybus 203 in Bratislava, 11. 6. 2016 16:00-18:00.
Custom built electromagnetic sensors were used to pickup electromagnetic waves produced by the trolleybus and amplified by special battery-powered "backpack" amplifier. Jonáš Gruska was walking through the vehicle during its operation and curating a listening experience for the audience by moving sensors through different parts of the machinery.
There is no recording from the performance, but the following field recording I made is very similar to what could have been heard at the time.
<html><iframe width="100%" height="166" scrolling="no" frameborder="no" allow="autoplay" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/212405726&color=%23ff5500&auto_play=false&hide_related=false&show_comments=true&show_user=true&show_reposts=false&show_teaser=true"></iframe><div style="font-size: 10px; color: #cccccc;line-break: anywhere;word-break: normal;overflow: hidden;white-space: nowrap;text-overflow: ellipsis; font-family: Interstate,Lucida Grande,Lucida Sans Unicode,Lucida Sans,Garuda,Verdana,Tahoma,sans-serif;font-weight: 100;"><a href="https://soundcloud.com/fields-by-gruska" title="ƒiēldṩ" target="_blank" style="color: #cccccc; text-decoration: none;">ƒiēldṩ</a> · <a href="https://soundcloud.com/fields-by-gruska/electromagnetic-trolleybus" title="Electromagnetic Trolleybus" target="_blank" style="color: #cccccc; text-decoration: none;">Electromagnetic Trolleybus</a></div></html>