Ever wondered what is the sound absorption of your absorber in situ?
SONOCAT
A multifunctional acoustic device for in-situ measurements.
Sound absorption of a material can now be measured in the field. It is well known that, normally, sound absorption measurement needs to be done in a reverberant sound field and controlled environment such as a reverberation chamber referred to the traditional method, for example, ISO 354. The reason is the measurement method relies on the sound field inside a reverberation chamber which cannot be obtained in situ.
Sonocat measures 3D sound waves, meaning that the equipment can distinguish between the incident wave, reflected wave, and the total or the active sound wave. This overcomes the limit of relying on the sound field when measuring sound absorption and sound transmission loss, allowing the acousticians to investigate these acoustic parameters in the field.
Sonocat can be useful in many cases, for example, when the test object cannot fit in the facilities or when it’s already installed at the site. Imagine a noise barrier that has been next to the highway for ten years, and the acoustic engineer needs to inspect whether the performance is still well-maintained. It won’t be possible to move the barrier to a lab, this is when in-situ measurement devices become handy. The engineer will be able to inspect the current performance of the absorption material inside the barrier as well as the sound transmission loss of the barrier, they can also use this to study the life span and plan for their next maintenance.
With the capability of measuring 3D sound waves, Sonocat can also be used to locate the sound source or the leakage point. This can be useful for those who work in the automotive industry, for example, inspecting the vehicle to find the correct spot that causes noise intrusion problems and deciding the most effective solution.
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