Soundproofing
Soundproofing deals with the containment of sound, so that it is not able to either enter or leave a protected area. This prevents persons within the protected area from being disturbed or from disturbing others. Typical solutions include soundproof walls, soundproof partitions, soundproof floors, soundproof ceilings, soundproof windows and soundproof doors.
For issues with reverberant rooms, speech intelligibility, excessive (disturbing) volume, problems with conference calls, uneven sound distribution, room resonances and room equalization, please see Acoustic Treatment.