EarSpy: Spying Caller Speech and Identity through Tiny Vibrations of Smartphone Ear Speakers. (arXiv:2212.12151v1 [cs.SD])

Eavesdropping from the user's smartphone is a well-known threat to the user's
safety and privacy. Existing studies show that loudspeaker reverberation can
inject speech into motion sensor readings, leading to speech eavesdropping.
While more devastating attacks on ear speakers, which produce much smaller
scale vibrations, were believed impossible to eavesdrop with zero-permission
motion sensors. In this work, we revisit this important line of reach. We
explore recent trends in smartphone manufacturers that include extra/powerful
speakers in place of small ear …

identity smartphone speakers speech spying tiny