> I'm almost thinking about how this could be turned into a device for conveying information with actual echos. Like the acoustic delay line memory used in ear

> I'm almost thinking about how this could be turned into a device for conveying information with actual echos. Like the acoustic delay line memory used in early computers? https://en.m.wikipedia.org/wiki/Delay_line_memory#Mercury_delay_lines https://en.m.wikipedia.org/wiki/Delay_line_memory#Mercury_de...