Graphical Construction Glossary >> Doors. >> Door types >> Acoustical Door
Many buildings such as schools and their music rooms, hotels and conference centres benefit from having modern methods of containing sound. Ceilings and walls are built to SEC ratings and so are doors. Many solid timber doors in themselves have excellent sound ratings and others of hollow construction require filling with mineral fillers. For a swinging door to work efficiently it has to have clearance around it's perimeter and it is that clearance that can leak sound etc though the door and frame unit.
With modern frame it is normal to see brush seals or neoprene strips to the top and sides. However the bottom of a door is a special case.
There are a large range of fitting that do this job of sealing the bottom of acoustical doors. Some are fairly generic and they can work of different doors and others are designed for specific door types. For instance there are ones that suit all glass doors and there are others that work well with sliding doors.
What you see here is a lift hinge. So if we had a fairly generic seal to the bottom of a door that uses these hinges, then it is easy to see that instead of the seal lifting to save wear and tear on it, we can get the same effect with these which lift up the whole door as it opens.
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