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Sound Insulation Performance

How to represent sound insulation performance
The sound insulation performance can be represented by the transmission loss. The transmission loss (TL: dB) is the decrease in power that occurs during transmission from a sound source room to a sound receiving room. In other words, the transmission loss can be determined by the difference between the incident sound and the transmitted sound.

Fire Resistant·Sound Insulation Wall "A-2000·WI"
TL = Incident Sound - Transmitted Sound = 56 dB


Sound Insulation Performance (TLD : Transmission Loss Difference)···Sound Insulation of Walls
The value of TLD is used for rating the sound insulation performance (Sound reduction index) of wall itself when tested in acoustic laboratories.

Sound insulation performance depending on construction methods
To improve the sound insulation of a wall between two rooms, it is necessary to improve both the air borne sound and the solid borne sound.
In general, walls incorporating plasterboards consist of a layer of plasterboard applied to both sides of studs, so the walls have a cavity between plasterboards. The air borne sound can be isolated easily, the solid borne sound, however, is difficult to be isolated because it can be easily transmitted through frame components (studs). Yoshino has been developing various walls to reduce the solid borne sound.
By combining construction methods and our variety of plasterboard products, we offer varied levels of sound insulation for our wall systems.


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