Soundproofing Toronto

	Home Insulation Soundproofing Acoustical Treatment

STC	What can be heard
30	Loud speech can be understood fairly well, normal speech heard but not understood
35	Loud speech audible but not intelligible
40	Onset of "privacy"
45	Loud speech not audible; 90% of statistical population not annoyed
50	Very loud sounds such as musical instruments or a stereo can be faintly heard; 99% of population not annoyed
60+	Superior soundproofing; most sounds inaudible

IIC	What can be heard
43	Footfall clearly audible
50	The least amount of impact sound transmission reduction considered effective
60	Considered a medium level of impact sound transmission reduction
65	Considered a high level of impact sound transmission reduction that would satisfy most occupants
74+	Footfall inaudible

	Party Wall Soundproofing Typical party walls rate STC 30-40. Adding insulation, additional layers of drywall, and damping compounds can net STC ratings in the low to mid 50's. Decoupling can net ratings of STC 60+.		Decoupled Ceiling Impact sound (footfall) is a common complaint and can be reduced with decoupling measures applied to either the offending floor or the ceiling below. Existing ceilings typically rate IIC 35-45.		Green Glue Damping Applied between two sheets of drywall, plywood or any commonly used building materials in new construction and remodeling, effectively reducing noise transfer from one room to another.		Isolation Clips Designed for use with various framing designs and applications. Isolation clips decouple drywall in wall/ceiling assemblies. Decoupling is the most effective way to reduce vibration.		Acoustical Treatment Surface mounted foam panels designed to minimize airborne sound reflection in offices, conference rooms, and commerical environments. High performance acoustical ceiling tile replacements are also available.