The larger of the two, the Acousti-shield 22 ($89 MAP), is a foldable stand mounted acoustic enclosure perfect for live sound and mobile applications. It uses a 16-gauge, perforated stainless steel shield mated to 53-mm thick high-density micro cell acoustic foam.

The smaller AS16 Acousti-shield (pictured and $69 MAP) is for studio recordings or on stages where a lower profile is desired. It uses a center-mounting system for a range of microphones from pencil condensers to the most popular dynamic instrument mics.

I tried the AS16 in a very ambient room to record a Martin acoustic guitar using the new CAD E70 ($129 MAP) pencil condenser microphone. I wanted to use the mic's omni-directional capsule to capture the guitar's entire sound plus some of the room's ambience. However since my guitarist plays loud, the omni pattern picked up a little too much of the room--an additional sound I would not be able to remove or reduce later.

I found that surrounding the mic with the AS16 reduced the room tone mixing with the direct sound coming into the E70. I tried the AS16 with the parabolic curve wrapping above and below the mic--that seem to kill the reflections from the floor.