Product optimization sound absorption
Wout Schwanen: “Sound absorption is an important property of the materials used in the construction industry and in civil engineering. Sound absorbing barriers alongside roads and railways protect the surrounding homes from excessive noise. And in offices and schools, sound absorbing wall and ceiling panels are essential for optimal room acoustics. However, different environments require a different approach to acoustic absorption. Together with you, we fully tailor the functionality of your product to the desired sound absorption.”
At an early stage, diverse test samples can quickly be investigated and compared with one another via measurements in the impedance tube in accordance with ISO 10534-2. The results of these measurements are intended as guidance for further product development, enabling the optimal combination to be sought in terms of product composition and acoustic properties. Based on our extensive experience and acoustic knowledge, we can make suggestions for alternative design choices.
The definitive design can be tested in a reverberation chamber. For this purpose we utilize the Van Dorsser Laboratory in The Hague, and we also have the option of having measurements carried out by our sister company Müller-BBM in their laboratory at Planegg. In the reverberation chamber the acoustic absorption of the product is determined in accordance with ISO 354. The results are then used to assess the complete absorption specifications of the product, including the sound absorption class and various single number ratings such as DL, αw and NRC.
We can also measure the sound absorbing properties of your product in the existing situation. There are a number of different measurement methods available for this. For example, we can use the extended surface method in accordance with ISO 13472-1, but also have the option of measuring the absorption of sound barriers in line with the EN 1793-5 standard. There are several advantages to these types of measurements, primarily because the measurement can be performed relatively quickly in situ.