aokeo ao-605 professional studio recording microphone isolation shield.high density absorbent foam is used to filter vocal, suitable for blue yeti and any condenser microphone recording equipment aokeo aokeo microphone isolation shield is designed for microphone-stand mounting, can accommodate any size microphones. create a closer, drier, more controlled vocal or instrument recording in many situations. standard 3/8" and 5/8" thread mount, allow it to be mounted directly on the vertical mic stand.