Sound Conversion for Hearing Loss PatientsHearing LossSensorineural CausesSensorineural PrevalenceExamplesProblem StatementProblem Statement Ctnd.Block DiagramAudio Signal Processing MethodSlide 10Audio Signal Processing MethodFuture Work (This semester)Future Work (later semesters)ReferencesQuestions?Sound Sound Conversion for Conversion for Hearing Loss Hearing Loss PatientsPatientsusing Texas Instruments DSP chipsusing Texas Instruments DSP chipsAdvisor: Dr. Thomas YenJack Ho – BSACKuya Takami – BWIGNathan Werbeckes – LeaderJoseph Yuen – CommunicatorHearing LossHearing LossConductiveConductiveIn middle or outer earIn middle or outer earWax, infection, foreign objectsWax, infection, foreign objectsDampens all soundsDampens all soundsSensorineuralSensorineuralLose high frequency soundsLose high frequency soundsAmplification no helpAmplification no helpSensorineural CausesSensorineural CausesBirth defectBirth defectDiseaseDiseaseMedicationsMedicationsLoud noisesLoud noisesBrain tumorsBrain tumorsHead traumaHead traumaAgingAgingSensorineural Sensorineural PrevalencePrevalence10% of US pop.10% of US pop. (31.5 Million)(31.5 Million)~3 / 1,000 birth ~3 / 1,000 birth defectsdefects65% below age 6565% below age 65ExamplesExamplesWhat they hearWhat they hearWhat we hearWhat we hearProblem StatementProblem StatementHigh frequency hearing High frequency hearing losslossNormal human hearing Normal human hearing rangerange10-20,000 Hz10-20,000 HzSpeaking rangeSpeaking rangeUp to 10 kHzUp to 10 kHzQuickTime™ and a decompressorare needed to see this picture.Texas InstrumentsTexas InstrumentsC5509 DSPC5509 DSPShift/compress frequenciesShift/compress frequenciesUsing DSP to process signals in real timeUsing DSP to process signals in real timeFrequency scanFrequency scanAestheticsAestheticsFashionableFashionableBluetooth Hands-free Device Look-alikeBluetooth Hands-free Device Look-alikeProblem Statement Ctnd.Problem Statement Ctnd.Block DiagramBlock DiagramElectrot Condenser MicrophoneElectrot Condenser MicrophoneTI Fixed Point DSP (TMS320VC5509)TI Fixed Point DSP (TMS320VC5509)Digital to Analog ConverterDigital to Analog ConverterPreamp and speakerPreamp and speakerAudio Signal Processing Audio Signal Processing MethodMethodAudio timescale-pitch modificationAudio timescale-pitch modificationResampling Resampling Phase VocoderPhase VocoderPitch Scaling (Transpose)Pitch Scaling (Transpose)What we hearWhat we hearWhat our device will sound likeWhat our device will sound likeWhat they would normally hearWhat they would normally hearAudio Signal Processing Audio Signal Processing MethodMethodResamplingResamplingAudio Signal Processing Audio Signal Processing MethodMethodPitch Scaling Pitch Scaling (Transpose)(Transpose)Future Work Future Work (This semester)(This semester)Build PlatformBuild PlatformLearn development kitLearn development kitWrite codeWrite codeTestTestFuture WorkFuture Work(later semesters)(later semesters)Convert all speech sounds to hearing foveaConvert all speech sounds to hearing foveaDifferent modes for different environmentsDifferent modes for different environmentsSmall enough to resemble blue tooth Small enough to resemble blue tooth headsetheadsetGood at sound localizationGood at sound localizationPsychoacousticsPsychoacousticsReferen ce sReferen ce
View Full Document
Unlocking...