Welcome to Redu-Sone

We are a start-up company based in the Nijverdal, The Netherlands. Our mission is to provide passive noise control solutions using innovative micro-perforated plate/panel (MPP) technology. Through thorough research/development efforts, we are the first to combine an economically scalable MPP production method with the acoustic know-how to create MPP-based duct silencers.

Advantages of Redu-Sone MPP silencers

Source-optimized

At Redu-Sone, we use sophisticated mathematical models to predict and optimize the MPP silencer designs. Whether the source is tonal, broadband, or low frequency, we can tune a custom silencer to reduce the noise emission as much as possible, within the given dimensional constraints. Using source tuning and optimization, our silencers can beat existing market solutions on both outer dimensions and insertion loss.

Clean gas

In heating, ventilation & air conditioning (HVAC) channels that transport moist air, traditional silencers have problems with mold deposition on the absorber material. Redu-Sone MPP silencers do not contain this “soft cushion” for mold and are therefore less prone to (the creation of) contamination.

High temperature & fire-proof

In traditional fiber-containing silencers, the risk of condensation and soaking of flammable components into the porous sound absorbing foam can lead to fire / explosion risks. As Redu-Sone silencers work with metal only, susceptibility to fire is considerably lower.

Long lifetime

For clean gas streams, Redu-Sone’s MPP silencers have a life long constant performance and are not subject to performance degradation, even under high acoustic and vibration load.

Low pressure drop

As opposed to e.g. automotive mufflers, Redu-Sone silencers do not block/obstruct the gas flow, and thereby do not introduce significant head loss in the system.

Recyclable

At the end of the silencer’s lifetime, no fouled absorber foam waste needs to be handled. MPP silencers can be build from metal only. In case of single metal MPP silencers, even no separation process is required.

MPP silencer technology

Micro-perforated plates (MPP’s) are metal sheets which are perforated with sub-millimeter sized holes. These small holes generate viscous friction when a sound wave passes through. The viscous friction converts acoustic energy into heat energy.

Around the MPP layer, there are several back cavities. These cavities have a resonator function, and let the molecules ‘breathe’ through the MPP layer. The resonance frequencies of the different chambers are tuned to achieve a maximal noise reduction in separate frequency bands, tuned to the dominating spectral components of the noise source.

Hear the effect of the Redu-Sone I-150

The Redu-Sone I-150 is a 150 mm inner diameter duct partitioffned cavity silencer. It provides effective noise reduction for low frequency fan noise in ducts, such as ventilation and exhaust gas channels.