Immediately after my coverage of PhotoPlus Expo 2012, I was going on vacation and needed to send a few voice over recordings back to the studio. When recording in a small untreated room you would normally have problems with an echo or reverb. Our solution was to build a frame of insulation around the microphone to prevent my voice from traveling around the room.
The idea works great if you’re in a pinch just using items that we normally travel with. If you don’t have a Zoom H1 recorder, this solution can also give you better recordings through your iPhone. There is also another great DIY Portable Sound idea here: http://cheesycam.com/diy-portable-sound-booth/