1. Also known as "Eggcrate louver" or Eggcrate grill." Type of glare shield used on a lighting fixture, characterized by compartments through which the desired light passes.
http://www.citytheatrical.com/la_1_info.htm#Egg_crate_louver
2. This is a type of foam, also known as convoluted, shaped similarly to half of an egg carton. It is useful in sound proofing. Most importantly however is its ability to cushion delicate items while keeping them relatively well in their original position due to its ability to compress its ridges and conform to the object.
http://www.industrialnoisecontrol.com/materials/acoustical-convoluted-foam.htm
http://www.citytheatrical.com/la_1_info.htm#Egg_crate_louver
2. This is a type of foam, also known as convoluted, shaped similarly to half of an egg carton. It is useful in sound proofing. Most importantly however is its ability to cushion delicate items while keeping them relatively well in their original position due to its ability to compress its ridges and conform to the object.
http://www.industrialnoisecontrol.com/materials/acoustical-convoluted-foam.htm