Researchers have discovered a new way to hack Alexa and Siri smart speakers merely by using a laser light beam. The attack leverages the design of smart assistants microphones, which work by converting sound (voice commands) into electrical signals. No physical access of the victims device, or owner interaction, is needed to launch the hack. Researchers tested the attack with a variety of devices that use voice assistants, including the Google NEST Cam IQ, Echo, iPhone XR, Samsung Galaxy S9 and Google.
Source: https://threatpost.com/alexa-siri-google-smart-speakers-hacked-via-laser-beam/149860/