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67 Sound Controlled Smoke Detector
Meng Gao
Xinrui Zhu
Yihao Zhang
Luke Wendt
Almost all of us encounters false fire alarms at some point in our life. Although many modern fire alarms have the ability to mute temporarily with a push of button, the physical location of the smoke detector does not always make it easy to do so.
At the same time, voice controlled products are entering markets, and gaining popularity in recent days. These products, such as Android phones and Amazon Echo, can be activated by keyword such as “OK Google”, ”Alexa”, or “Amazon”.
Therefore, we propose a sound controlled fire alarm that allows you to easily turn the alarm off by shouting the keyword "cooking" when false alarm happens (in addition to a push button). The project will contain two parts: 1) a smoke alarm circuit with carbon monoxide sensor, microphone, mute button, and 2) a DSP core for the key word recognition.
The user will need to train the alarm once, where the DSP will find and store the Mel-Frequency Cepstral Coefficients (MFCCs) for the training word. Then once the alarm is triggered, interrupt will be served to the core through a interrupt pin or a GPIO, and the DSP will actively listen for any keywords, finding the MFCCs for what it hears, and comparing with the stored MFCCs. If the mean square error is below a threshold, the DSP will stop the alarm.
In additional, if we have time, we may also look into Dynamic Time Warping (DTW) to improve our accuracy.

LED Cube

Michael Lin, Raymond Yeh

LED Cube

Featured Project

LED technology is more advanced and much more efficient than traditional incandescent light bulbs and as such our team decided we wanted to build a device related to LEDs. An LED cube is inherently aesthetically pleasing and ours will be capable of displaying 3D animations and lighting patterns with much increased complexity compared to any 2D display of comparable resolution. Environmental interaction will also be able to control the various lighting effects on the cube. Although our plan is for a visually pleasing cube, our implementation can easily be adapted for more practical applications such as displaying 3D models.