Great ideas like that tend to get recycled. So, recently artist Yosef Lerner unveiled a pedestrian horn for the 21st century. His intent was satirical. He wanted to make the point that honking at people can be obnoxious, whether you're on foot or in a car. But for a while he was actually offering his pedestrian horn for sale on his website, at $699 each. He decided to stop selling them because (as he told Gizmodo) he didn't want "to contribute to any more noise in this city!”
For the record, Tupman didn't invent the idea of a pedestrian horn. Actress Eleanor Whitney had rigged one up in 1932.
Chambersburg Public Opinion - Apr 9, 1932
And as early as 1927, there's a report in the NY Times about an unnamed man from Southampton, England who had attached a "miniature but noisy motorhorn" to his walking stick and then "sounded warning blasts to the more fortunate ones in automobiles when he was about to cross."
Category: Motor Vehicles | Cars | Cacophony, Dissonance, White Noise and Other Sonic Assaults