I applaud your synesthesia! Those of us with more common auditory processing are unable to see sound. :( si·ren (sīrən)noun 1.a device that makes a loud prolo

I applaud your synesthesia! Those of us with more common auditory processing are unable to see sound. :( si·ren (sīrən)noun 1.a device that makes a loud prolonged sound as a signal or warning.