Understanding STC in Relation to Glazed Partitioning Systems

In today’s dynamic office settings, the demand for versatile and adaptable spaces has surged. Traditional walls are giving way to innovative solutions that encourage collaboration while safeguarding privacy. One such solution is the acoustic glass panel, striking a balance between transparency and sound control, crucial for maintaining a productive work environment.

When integrating acoustic glass partition systems into offices or commercial spaces in Singapore, it’s vital to consider the Sound Transmission Class (STC) rating. This rating directly influences the system’s ability to block sound transmission, preserving confidentiality within different areas of the office.

What is Sound Transmission Class (STC)?

Sound Transmission Class (STC) is a numeric rating used to quantify the sound reduction capability of partition, specifically in reducing airborne sound transmission, or noise passing from one room to another. It serves as a standardized measurement that provides a common reference point for comparing the sound insulation properties. The higher the STC rating, the more effective the glass is at reducing sound, measured in decibels (dB).

For instance, a glass partition with an STC rating of 30 (E.g. Single Glazed Panel) will provide moderate sound reduction, meaning it can reduce sound transmission by approximately 30 decibels. Hence, providing moderate sound reduction, suitable for spaces where general conversations occur. On the other hand, an STC rating of 40 (E.g. Double Glazed panel) or above offers excellent sound control, reducing sound transmission by 40 decibels or more. This makes it suitable for private meeting rooms or spaces where confidential discussions take place.

The above illustration provides a visual representation of the capabilities of our SOLO Glass Panel, which is crafted with high-quality tempered glass and offers an excellent STC Value of 31. In an office environment with a noise level of 60dB, the installation of the SOLO Glass Panel results in a noticeable reduction, creating a more comfortable sound level of 29dB in the meeting room.

For those seeking even greater sound reduction using SOLO system, we offer the option to construct the panel with laminated glass, with a higher STC value of 38. By choosing the laminated glass option, the sound level experienced in the meeting room is further reduced to a mere 22dB, providing an ideal environment for focused discussions and meetings.

Additionally, for clients with a heightened emphasis on acoustic excellence, our COMO Glass Panel emerges as the pinnacle solution. With an impressive STC of 43 for Clear Tempered Glass and an outstanding STC of 49 for Laminated Glass, the COMO Glass Panel provides excellent acoustic barrier.

How is STC Calculated?

The STC rating is determined through rigorous testing in specialized laboratories. During this process, a sample of the material or partition is exposed to various sound frequencies, and the sound levels are measured on both sides of the material. The difference in sound levels is then analyzed to calculate the STC rating. The rating is based on the transmission loss across a range of frequencies, typically between 125 Hz to 4,000 Hz. Our glazed partitioning systems are meticulously tested at a Singapore Accreditation Council (SAC) accredited agency, TÜV SÜD PSB, ensuring accurate and reliable STC ratings.

Factors Affecting the STC Level on Site:

When installing an acoustic glass system in an office, it’s crucial to recognize that the STC rating may vary between laboratory testing and real-life on-site installations. Factors affecting the STC level on-site can impact the overall acoustic performance of the acoustic glass partition systems.

One critical consideration is flanking transmission, which occurs through paths other than the primary barrier, such as the glass partition. Flanking transmission can happen through various building elements, including:

• Ceiling: Sound can travel through the ceiling structure, especially if it lacks proper insulation or acoustic treatment.
• Aircon System: HVAC systems can act as conduits for sound transmission if not adequately arranged.
• Flooring System: The type of flooring and its sound-absorbing properties can influence sound transmission. For example, if the flooring is carpeted, it will have better acoustic properties as compared to a vinyl flooring.
• Other Acoustic Material Support: Additional elements like soundproof paint, suspended ceiling clouds, or upholstery can impact the overall soundproofing performance.

It’s important to manage expectations and understand that achieving the exact laboratory-rated STC performance on-site may be challenging due to these factors. However, by adopting thoughtful design, proper insulation, and strategic placement of acoustic treatments, businesses can still significantly enhance the overall acoustic performance of their acoustic glass partitioning systems.

With acoustic glass partition systems, experience a seamless blend of modern aesthetics and powerful sound control. Combine laboratory-rated STC performance with our expertise in acoustic glass to craft an acoustically optimized environment that nurtures productivity and well-being for every occupant.