Chapter 11
Mic Jammer
Allison Burtch and Eric Rosenthal
Mic Jammer is an ultrasonic security system that gives people the confidence to know that their smart phones are non-invasively muted. When pointed at a smart phone, it de-senses the phone’s microphone by applying a high-level, ultrasonic signal inaudible to humans but not to technologies.
Figure 11.1. Mic Jammer. Format: Ultrasonic security system. Materials: Smart phones, printed circuit boards, ultrasonic signals, and various electronic components, including an ultrasonic speaker. Allison Burtch and Eric Rosenthal. Courtesy of Allison Burtch.