Not surprisingly, a wearable “Surveillance Spaulder” hails from the surveillance capital of the western world: London. James Bridle made the CCTV surveillance detector for Wearable Futures’ Futures 10 exhibition. He explains at his blog:
The spaulder is a traditional component of medieval plate armour, designed to protect the wearer from unexpected and unseen blows from above. The Surveillance Spaulder continues this tradition into the present day – and the electromagnetic spectrum – alerting the wearer to the violence of ubiquitous surveillance.
The spaulder contains a CCTV detector, based on a design by anonymous security researcher Puking Monkey. The detector filters the light it collects through a 730nm bandpass filter to isolate the infrared lighting used in most commonly-deployed CCTV cameras. When it receives a signal, it pulses electric current through a pair of transcutaneous electrical nerve stimulation (TENS) pads attached to the wearer’s shoulder, causing them to twitch sharply.