Megphone design question

Sanon

Member
2010-09-07 3:26 pm
Hi forum,

[IMGDEAD]http://lh3.googleusercontent.com/public/_cPoaqJtcq_24n8dGHNW5_GJlknr2bVUm7t4nJUbbn2uYVESHjH9RYT0I4qUtfjyVGQ8k4MoajAKQm7BUHDpHPMHw2DngaN-441HQZzAUxJIbJ38u6IW_y7PR88QZOTKgN7NgPyWkqP2WeuIuESXVBd5JIXG[/IMGDEAD]

The attaches is a pic of megaphone . I need to ask as regarding the central portion of the flare , there is a cavity what is that called technically and does it provide any amplification ,even if we do not use the outer flare.

Thanks in advance.