Noise characterisation of ventilation valves based on simplified network models

What is it about?

A compact measurement method is used to characterise the noise emitted by ventilation valves such as those found in residential ventilation systems and in transporation systems. A calibration method is used to account for the shape of the acoustic field inside such compact setups. Simplified mathematical models are used to characterise the properties of the valve, which can be directly used in network modelling tools. Such network tools can predict the noise emmited by a complete system in several seconds within an accuracy of several decibel, which is infeasible with current complex modelling tools for a whole network.

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Photo by Steve Pancrate on Unsplash

Photo by Steve Pancrate on Unsplash

Why is it important?

Current measurement techniques to determine noise from ventilation valves require large measurement rooms with thick dampening walls or carefully selected reflective walls. However, such rooms are expensive to construct for many manufacturers of ventilation valves, and therefore this method can provide a cost-effective method for smaller manufacturers to measure their concepts in an early design stage.