Originally Posted by
mapleg
You know, in 50 plus years of travel it has never occurred to me once that "hey, I should travel with a personal alarm".
When I first went to stay at a school away from home, I was given a welcome kit that included a safety whistle along with a long lanyard for a key and whistle attachment. While the whistle may be more attention grabbing than a dog bark, the whirling keys had their own use.