The SPF POP FILTER consists of two parallel ortophonic rings mounted on a brace and fixed to an articulated arm. It attenuates high impact phonetic peaks and reduces sibilance. For smaller mics, this unit can be attached to the SSM-1 shockmount. The SABRA’S 5″ Screens are made of special ortophonic fabric, creating hard phonetic noise attenuation, while maintaining the frequency curve of the original sound.