Category Archives: How does it really work

Inflated NRC

12 March 2012 | Category: Interesting facts, The incomparable Fellert humor, How does it really work

A while ago our American colleagues went ballistic about the latest absorption data published by one of our competitors. Why? -simply because the competitor had managed to manipulate the test specimen in a way that gave them approximately 0,2 extra NRC. A product with an NRC of 0,7 would then suddenly, like magic, have an […]

Acoustics made easy-phase inverted anti noise

10 March 2012 | Category: Interesting facts, How does it really work

Have you heard that there are aircrafts that have microphones installed in the cabin recording the cabin noise and speakers playing this noise back in the cabin and that all this is done to reduce the noise in the cabin. This technique is also used in more trivial things like earphones. I know that Sennheiser’s […]

Bullet proof vest technology

8 March 2012 | Category: Interesting facts, How does it really work

Buildings tend to move a little bit as gravity and pressure does its work.Sometimes temperature variations and variations in humidity adds up to this as well. The solution to this is normally called expansion joint. An expansion joint however is nothing you’d like to have in your design because of its fabulous look – on the […]