STUDIO

Creating a tranquil and secure environment is essential, and noise control plays a vital role in achieving this goal. The effectiveness of glass partition systems, including doors, is measured using STC ratings. Higher ratings indicate greater efficacy in reducing sound transmission. What is STC?

Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations.

Sound Transmission Basics

Decibels (dB): Decibels are used to measure the loudness of a sound. A lower dB value, like 50 dB, represents a quieter sound, while a higher value, like 140 dB, can be dangerously loud and cause immediate ear injury. Transmission Loss: Transmission loss is a measurement of the difference in dB (volume) on both sides of a wall. For example, if a 70 dB tone is played on one side of a wall and measured as 30 dB on the other side, the transmission loss would be 40 dB. This indicates that 40 dB less sound energy passed through the wall to the other side.

Frequency (Hz): Frequency refers to the pitch or musical note of a sound and is measured in Hertz (Hz). It can range from high pitches like those produced by a flute (around 2000 Hz) to low pitches like those from a tuba (as low as 29 Hz). Most humans have the ability to hear frequencies ranging from about 20 Hz (low) to 20,000 Hz (high). However, this range tends to decrease as we age.

5 Ways to improve the acoustic performance of glass partitions

1.Make sure the walls extend from the floor all the way down to the deck, otherwise the sound will go right through the static pressure chamber.

2.Adoption of glass with better acoustic performance

Laminated glass /Double-layer insulated glass /Double Asymmetric Glass Panels

1，Laminated glass

PVB and EVA are solid insulators.PolyVinyl Butyral (PVB) or Ethylene Vinyl Acetate (EVA) adhesives harden to sandwich two lites together. The laboratory has proved that laminated glass has better sound insulation performance than Monolithic Glass.

2，Double-layer insulated glass

Double-glazed, or double-pane glass features two lites in a frame with a layer of air between them. The gap between lites also provides acoustic insulation, to improve STC ratings. Heat efficiency usually requires a maximum gap of 16 millimeters, but a larger space is always better for soundproofing.

3，Double Asymmetric Glass Panels

Insulating glass panels made with glass assemblies of different thicknesses perform better, especially at high frequencies, due to the fact that the overlap thresholds of the two assemblies are not at the same frequency. The performance level of double asymmetric glass panels is superior to that of double symmetric glass panels when the total thickness is equal.

3.Filling the aluminum frame with eva material increases sound loss.

4.Use acoustic system doors (D62 PLUS DOOR)

5.The bottom of the door to add automatic sealing strip.