TY - PAT
T1 - Causing a voice enabled device to defend against inaudible signal attacks
AU - Roy, Nirupam
AU - Choudhury, Romit Roy
AU - Hassanieh, Haitham Al
N1 - FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support of contract 1619313 awarded by the National Science Foundation. The government has certain rights in the invention.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - A voice enabled device includes a transducer to capture multiple inaudible signals received from multiple ultrasonic speakers and audio recording electronics to process the multiple inaudible signals to generate digital output samples, which are recorded sound data comprising non-linearities from frequency-shifted versions of the multiple inaudible signals to within an audible frequency range. A processing device is to detect, within the recorded sound data, at least a portion of the non-linearities, e.g., via: comparison of the recorded sound data with expected patterns from an audible audio signal generated by human voice; and detection of non-linear variations within the recorded sound data as compared to the expected patterns. In response to the detection, the processing device is further to suppress an action programmed for response to a voice command corresponding to the recorded sound data.
AB - A voice enabled device includes a transducer to capture multiple inaudible signals received from multiple ultrasonic speakers and audio recording electronics to process the multiple inaudible signals to generate digital output samples, which are recorded sound data comprising non-linearities from frequency-shifted versions of the multiple inaudible signals to within an audible frequency range. A processing device is to detect, within the recorded sound data, at least a portion of the non-linearities, e.g., via: comparison of the recorded sound data with expected patterns from an audible audio signal generated by human voice; and detection of non-linear variations within the recorded sound data as compared to the expected patterns. In response to the detection, the processing device is further to suppress an action programmed for response to a voice command corresponding to the recorded sound data.
M3 - Patent
M1 - 11264047
Y2 - 2020/04/24
ER -