DNC-B is double layered door sound insulation, with NRC 1.0 (100% sound absorption) and will reduce large amount of noise coming through the door, but remember will not mute sound completely, because NRC standard do not measure whole hearing range.
Sliding door fitting, HAWA Junior 100 B, Acoustics Set - in the Häfele America Shop
RYB HOME Large Soundproof Blanket, Thermal Insulated Door Curtains for Doorway Noise Reducing Divider for Workshop Basement Laundry Acoustic Covering as Moving Blanket, W48 x L96 inch, Black, 1 Panel : Home & Kitchen
Sound insulation
Door acoustic blanket DNC-B, Black 100 x 235cm, double-layered door sound insulation
Door acoustic blanket DNC-W, White 100 x 235cm, double-layered door sound insulation
The Hawa 100 B Acoustic Sliding Door Hardware, for Pocket Doors or Wall Mounting, effectively dampens noise, drafts, odors and unwanted light between
Hafele Soundproof Sliding Door Hardware with Soft Stop, HAWA Junior 100 B, up to 220 LB
Door acoustic blanket DNC-B, Black 100 x 235cm, double-layered door sound insulation
The popular Door blankets are designed to be attached above a door to dampen the sound going through the doorway., Door Noise Control panel helps to
Door Noise Control Cover (38x90). Double Layered Sound Absorption Blanket. DNC
Door acoustic blanket DNC-B, Black 100 x 235cm, double-layered door sound insulation
Door acoustic blanket DNC-B, Black 100 x 235cm, double-layered door sound insulation
Window acoustic blanket WNC-B, Black 100 x 180cm, double-layered window sound insulation
Soundproof Pocket Door, Acoustic Sliding Door
Door acoustic blanket DNC-W, White 100 x 235cm, double-layered door sound insulation