Gyrophone Recognizing Speech from Gyroscope Signals

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1、Gyrophone:RecognizingSpeechfromGyroscopeSignalsYanMichalevskyandDanBoneh,StanfordUniversity;GabiNakibly,NationalResearch&SimulationCenter,RafaelLtd.https://www.usenix.org/conference/usenixsecurity14/technical-sessions/presentation/michalevskyThispaperisincludedintheProceedingsofthe23rdUSENIXSecu

2、ritySymposium.August20–22,2014•SanDiego,CAISBN978-1-931971-15-7OpenaccesstotheProceedingsofthe23rdUSENIXSecuritySymposiumissponsoredbyUSENIXGyrophone:RecognizingSpeechFromGyroscopeSignalsYanMichalevskyDanBonehGabiNakiblyComputerScienceDepartmentNationalResearch&SimulationCenterStanfordUniversity

3、RafaelLtd.Abstractgyroscopesaresufficientlysensitivetomeasureacous-WeshowthattheMEMSgyroscopesfoundonmod-ticvibrations.Thisleadstothepossibilityofrecoveringernsmartphonesaresufficientlysensitivetomeasurespeechfromgyroscopereadings,namelyusingthegyro-acousticsignalsinthevicinityofthephone.There-sco

4、peasacrudemicrophone.Weshowthatthesamplingsultingsignalscontainonlyverylow-frequencyinfor-rateofthegyroscopeisupto200Hzwhichcoverssomemation(<200Hz).Neverthelessweshow,usingsignaloftheaudiblerange.Thisraisesthepossibilityofeaves-processingandmachinelearning,thatthisinformationisdroppingonspeechi

5、nthevicinityofaphonewithoutsufficienttoidentifyspeakerinformationandevenparseaccesstotherealmicrophone.speech.SinceiOSandAndroidrequirenospecialper-Asthesamplingrateofthegyroscopeislimited,onemissionstoaccessthegyro,ourresultsshowthatappscannotfullyreconstructacomprehensiblespeechfromandactiveweb

6、contentthatcannotaccessthemicro-measurementsofasinglegyroscope.Therefore,were-phonecanneverthelesseavesdroponspeechinthevicin-sorttoautomaticspeechrecognition.Weextractfea-ityofthephone.turesfromthegyroscopemeasurementsusingvarioussignalprocessingmethodsandtrainmachinelearningal-1Introductiongor

7、ithmsforrecognition.Weachieveabout50%successrateforspeakeridentificationfromasetof10speakers.Modernsmartphonesandmobiledeviceshavemanysen-Wealsoshowthatwhilelimitingourselvestoasmallvo-sorsthatenablerichuserexperience.Beingge