One low tech solution involves people on bicycles shouting warnings about approaching cyclones into a megaphone – a handheld cone-shaped device that makes your voice louder when you speak into it.
" Low (low) – tech (tech)" is a term referring to " low technology" – technology that is very old, that is very simple, that has, perhaps been around for a long time.
Low technology, often abbreviated low tech (adjective forms low-technology, low-tech, lo-tech) is simple technology, often of a traditional or non-mechanical kind, such as crafts and tools that pre-date the Industrial Revolution. It is the opposite of high technology.