Brief Introduction 1 Project Progress 2 Future Work 3 Content Brief Introduction What are we doing Artificial Cochlea Extracorporeal Device Cochlear Implant Processor Collect and process the environmental sound ID: 1044103
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1. Bluetooth CochleaJiawen Gu, 5130309763
2. Brief Introduction1Project Progress2Future Work3Content
3. Brief IntroductionWhat are we doing
4. Artificial CochleaExtracorporeal DeviceCochlear ImplantProcessorCollect and process the environmental sound Transfer coilTransfer the processed signal to implant by RFStimulation ElectrodesStimulate acoustic nerve ending as soundReceiving coilReceive encoded signal and control the electrodes according to preset program①②②①
5. Widely used bluetooth audio products development boardBluetooth ChipCSR8670
6. Control ProtocolGaia —— Generic Application Interface ArchitectureEstablished on a SPP connectionImplements an end-to-end, host-agnostic ecosystem supporting host application access to device functionalityCommand format:Vendor ID: 16-bit field qualifies the command Command ID: 16-bit field identifies the individual commandPayload: The payload contains any information required to be passed by a specific command
7. Project ProgressWhat we have done
8. User Interface Optimization
9. Basic Function of Android APPPairingDevice status inquery ( battery, rssi )Volume control
10. File Transfer Rate TestSend packets via Gaia commands ( each packet carries at most 250 bytes )Result: 2.5KB/sVery slow!The chip can process only one gaia command at a time, any packet received while processing will be received and demodulated but not handled. It will be droped before it's delivered to application level.
11. Device Loss AlarmVery expensive!The cochlear implant cannot work aloneA: actual value of |RSSI| when d = 1mn: attenuation factor, in air n = 2.0 RSSI (Received Signal Strength Indication)ImplementationRSSI fluctuates a lotThree continuous RSSI smaller than threshold triggers an alarmEstimate distance with the average value of recent 3 rssi records
12. Future WorkProblems to be conquered
13. 0102Scene RecognitionNoise ReductionLearning based audio scene recognitionApply different sound process-ing program according to different sceneGreatly improve the performance of artificial cochlea in noisy envi-ronmentFuture Work
14. THANKS