The metropolitan in it's natural habitat; unaware, oblivious, purposefully deafened and subsequent prey. To increase perception thus safety, we wed an Arduino Nano and ultrasonic sensor to regulate volume to proximity to some one behind you; easily deactivated per environment and rechargeable. Beyond this proof of concept, intention for apparel or accessory (purse, back pack) embedding is ideal.
(Disclaimer) TVMiller is NOT a metro-any-dang-thing!
This prototype of a prototype is a mono-version. A stereo version would merely require dual channels (pots). Aptly, imagine if you will, you plug your head phones in to your purse strap which is embedded with a Metrophone with bluetooth that streams to your smart phone...or or or you could PAY ATTENTION! Sorry not sorry.
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