Now a team from Zhejiang University has taken it another level by sending out voice commands at frequencies above the 20KHz limits of human ears:
Using a technique called the DolphinAttack, a team from Zhejiang University translated typical vocal commands into ultrasonic frequencies that are too high for the human ear to hear, but perfectly decipherable by the microphones and software powering our always-on voice assistants. This relatively simple translation process lets them take control of gadgets with just a few words uttered in frequencies none of us can hear.
With only $3 worth of hardware one can build such a converter themselves.
Siri Proxy is a proxy server for Apple’s Siri “assistant.” The idea is to allow for the creation of custom handlers for different actions. This can allow developers to easily add functionality to Siri. Here’s a demonstration that I wrote: It allows me to control my thermostat when I am at home. Doesn’t require a jailbreak or anything, since it’s all going on off the device.