That wouldn’t require some way to add energy to the sound?
In: 10
Yes, if *amplification* was what was happening, but they don’t, they *focus* the sound.
I assume you’re referring a cone like those [old-timey cones](https://www.gettyimages.in/detail/photo/female-cheerleader-using-megaphone-royalty-free-image/YSP_073?adppopup=true) cheerleader’s had at football games and not a modern speaker system.
Basically, if you imagine shouting, that sound energy spreads in a sphere around your mouth. Some goes back behind your head, some to the sides, and some forward. But if you shouted into an old-timey cone more of that sound energy is focused, and projected forward. It’s not something for nothing, it would be quieter behind and to the sides and *that* energy is redirected forwards to the audience.
You do something similar with light in [this](https://www.etsy.com/listing/1174475602/antique-brass-wall-candle-holder-sconce) you reflect the light outwards and it appears brighter
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