Sound Insulation Performance: (Acoustics)
Sound insulation refers to the ability of a material or partition / ceiling system to stop or reduce airborne sound.
Internal Sound Insulation:
Internal sound insulation is important when designing a partition wall, to stop noise passing through from an adjoining room
External Sound Insulation:
External sound insulation refers to the ability of materials to reduce sound transferring into or from a building. Good external sound insulation is important when designing and constructing external elements of a building. This includes walls, windows, doors, ventilation and roofing.
Sound absorption is the ability of a material to absorb sound within a room.
Flanking is the transfer of noise through paths around a building element, rather than through the element itself. Flanking describes the transfer of noise through, gaps, cracks in the building element, incorrectly sealed junctions between elements
Description of common terms used when describing sound insulation performance (dB)
The decibel (dB) is the unit used for sound level measurement. Variations of (dB) are used for different types of noise measurement. The most commonly used variation is the (dBA)
Unit of sound level in weighted decibels. The human ear is not equally sensitive to all frequencies of sound. The A weighting approximates the sensitivity of the ear by filtering these frequencies. A (dBA) measurement is considered representative of average human hearing.
Effects of different walls on sound insulation perfomance