Horn speaker in wall installation details in AutoCAD, dwg file.

This Architectural Drawing is AutoCAD 2d drawing of Horn speaker in wall installation details in AutoCAD, dwg file. By using a flared transmission channel (a horn) the effective radiating area of the source of sound can be increased to that of the mouth, thus creating greater air coupling (louder sound). Because of the gradual change of the diameter of a horn, the source of sound at the throat engages all the air in a horn.