The ClearSonic MiniMega booth is a quick and easy way to effectively enclose drums, vocalists, or other instruments. The total sound reduction after setting up the Mini Mega is approximately 16dB (about 50% reduction of perceived volume). An omnidirectional microphone was used and placed approximately 12 ft from the drums. No volume or gain settings were adjusted. A door is located on either side of the booth, where the back shield meets the front shield. Please visit www.clearsonic.com for more information on our portable sound isolation products.