Blow the Whistle
I remember when women (in the US) were encouraged to wear whistles around their necks for their safety. Can we improve on the concept of the low-fi personal alarm?
Thinking about low-fidelity solutions, the whistle came to mind. I did find an
online store that sells 21st century personal alarms and other safety accessories. For many reasons these tools are inadequate, but what if they can be combined with other technology?
One idea that came to mind was to take advantage of the gunshot sensors that are being installed around urban areas in the US. Developing a whistle alarm at a frequency that the gun shot detector can detect would provide an additional layer of safety in areas where this technology exists.