Video demonstration
Photo Gallery |
This is the screenshot of the backend console. The board records 5 seconds of wave file with 480 kHz sampling rate. Then, the short-term energy will be calculated. If the energy doesn’t pass the threshold, the system will not pursue the further prediction. If the energy is high enough, the system will send features to the cloud, and the AWS ML will return the predicted result. This screenshot shows that there is someone close the door, and knocked the door twice. |