What is sound insulation?
Acoustic insulation, also called sound insulation, allows you to suppress or attenuate noise coming from outside a room.
What is acoustic correction?
Acoustic correction or sound absorption eliminates or reduces sound reverberation in a room through the ceiling, walls or floor.
What is sound insulation?
Sound insulation concerns noise from outside a building, both individual and collective (noise between two floors, between neighbors on the same floor, noise from the street, etc.).
What are the different types of noise?
There are 4 types of noise:
Impact noises (or solid-borne noises), which spread inside the structure of the building, through the floor and through vertical separations (interior or exterior partitions): impacts of footsteps, moving furniture, etc.
Interior airborne noise that propagates from one room to another through technical ducts, pipes or masonry: the sound or voices of television sets for example.
External airborne noise which is mainly diffused when the insulation of openings (windows, doors) and walls is too weak: rail or urban traffic, etc.
Equipment noise related to the installations with which a building is equipped: heating, ventilation, piping, etc.
What laws govern sound insulation?
2 laws govern the different methods of implementing acoustic insulation.
mass law
The mass of a material attenuates the propagation of sound. + the material is heavy, + it slows down the transmission of sound waves. At equal thickness, a stucco wall protects against noise better than a plaster partition.
The mass-spring-mass law
The principle of the mass-spring-mass law is based on the interpolation of a “spring” material (insulation or air) between 2 masses (original wall and marble slab for example). The sound waves passing through a wall are absorbed by the spring, which transmits them in a damped way to the 2nd mass.
Acoustic insulation systems that use this principle are lighter and more efficient.
From how many decibels, an acoustic improvement is perceptible?
To be noticeable, an acoustic improvement must be greater than 3 decibels (dB). Reducing the sound level by 10 dB gives the impression of hearing half the noise.
What is architectural acoustics?
Architectural acoustics is a technological and scientific field whose aim is to control and understand the propagation of sound in buildings.