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“The difference between 65dB and 53dB may not sound as a huge difference, but it is a very significant sharpening that involves in subjective terms, bringing the noise to half its current level”, according to Kerstin Persson Waye, professor of Environmental Medicine at the University of Gothenburg, who is part of the team developing these guidelines.
So what needs to be done to live up to this updated demand on more silence?
“It is important for the industry to produce quieter vehicles, trains and aircrafts; quieter machines” - Prof. Persson Waye-.
She believes that it will also be required to introduce this new noise targets already in the design and planning stages. “All of these factors needs to be considered as a whole”.

Our Lab has also had a fun year, building a 10-meter long measuring set to evaluate the noise damping contribution (input silencer IL) on ventilation silencers, with or without airflow. This was built with full compliance to SIS ISO 3725: 2009 and is calibrated and running.
This is the most widely used method for measuring sound properties on various components in ventilation systems. We are currently testing in this new measuring tool how we can best use the unique features of the Acustimet family to maximize the sound in an air channel.
Our Acoustic Lab can now offer our customers who manufacture solutions that involve air-transportation, the unique service of measuring their sound parameters, including pressure drop- and leakage measurements. Together with our highprecision measuring tube for measuring 2-port parameters according to ASTM 2611, we have a solid ground for handling,
analyzing and designing solutions for the sound challenges in air channels.

Acoustic measurement for ventilation devices

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