Acoustic Testing Insights: Lab, Field, and Simulation

Acoustic performance plays a crucial role in designing spaces, particularly when considering glazed partitions and sound insulation systems. While Sound Transmission Class (STC) ratings are often used to compare products, it’s important to understand how these values are determined. This article explores three primary methods of acoustic testing—computer simulations, field testing and laboratory testing —highlighting their unique advantages and considerations.

Computer simulations are commonly employed by companies to predict the acoustic performance of glazed partitions and other sound insulation products. These simulations model sound propagation and provide estimates of a product’s STC rating. Many companies offer these results to showcase a product’s predicted performance, often presenting higher STC ratings. While useful during the early stages of project planning, these simulations have certain limitations.

Although computer simulations can provide valuable insights into potential performance, they do not involve testing the actual product itself. The primary advantage of simulations lies in their cost-efficiency, offering preliminary acoustic predictions without the need for physical prototypes. However, they do not account for factors such as material quality or workmanship during installation, both of which can significantly affect a glazed partition’s actual performance.

While computer simulations serve as a useful gauge for early planning, they should be viewed as supplementary rather than a definitive representation of how a glazed system will perform once installed.

Field testing is conducted on-site after the glazed partitions have been installed in their intended environment. This method evaluates the acoustic performance in the actual project setting, considering variables such as room layout, furnishings, ceiling materials, and ventilation systems. While field testing provides insight into how sound behaves in the specific setting, the results can be influenced by these varying conditions.

For example, a field test in a furnished office space may yield different results compared to a laboratory test because the acoustic performance could be impacted by factors unrelated to the partition system itself. Therefore, field testing might not always accurately represent the STC value of the glazed partition alone.

Field testing is still valuable for verifying that an installed system meets acoustic performance standards, but it should be understood that it does not provide the same level of precision as laboratory tests.

Laboratory testing is regarded as the most controlled and reliable method for evaluating the acoustic performance of materials, including glazed partitions. Conducted in specialized acoustic labs, these tests measure sound absorption, transmission loss, and other key parameters in a setting free from external interference. By focusing solely on the product, lab tests provide a clear and accurate picture of the glazed partition’s performance. This controlled precision makes laboratory testing the most dependable method for evaluating acoustic performance.

One of the main advantages of lab testing is the use of standardized procedures established by recognized bodies like ASTM, ISO, and ANSI, ensuring results are consistent and replicable. For instance, STC ratings obtained from laboratory tests are often considered the most reliable indicators of a material’s sound insulation capabilities. These tests utilize advanced equipment, such as microphones and sound analyzers, to capture precise data.

For our glazed partitions, we ensure that all laboratory tests are conducted at TÜV SÜD, a globally recognized and accredited laboratory, to guarantee the highest level of accuracy. These rigorous testing standards empower clients to make informed decisions based on results that genuinely reflect the product’s performance in an ideal controlled environment.

We offer a range of glazed partition systems and glazed doors that fulfill modern office acoustic wall requirements. Each product features detailed specifications, including the respective STC rating based on our laboratory tests.

When evaluating the acoustic performance of glazed partitions from any provider, it’s crucial to understand the testing methods—whether through computer simulations, laboratory testing, or field testing—and how the values are determined before making comparisons of STC ratings. Without considering the methodology behind these numbers, comparisons may not accurately reflect the product’s true capabilities.

While field tests can provide valuable insights into a system’s performance in its intended environment and computer simulations offer cost-effective predictions, laboratory testing remains the most reliable approach. By evaluating products in a controlled setting, lab tests yield precise and consistent results. For those prioritizing quality acoustic performance, results from accredited laboratory testing are essential for informed decision-making.