PrivacyCase Exclusive: Researchers discover your phone's microphone isn't the only thing that can be used to listen to you.
First: Thank you for the private submission.
Researchers from Stanford University in conjunction with National Research & Simulation Center Rafael Ltd. show that the gyroscopes found in most modern phones are sensitive enough to detect sound in the vicinity of the phone. Using filters and signal processing they can "identify speaker information and even parse speech".
iOS and Android require no special permissions to access the gyroscope, allowing apps and active web content that cannot access the microphone the ability to still eavesdrop on speech in the vicinity of the phone.