Wilhe the music studios are being finished off, their sound insulation is extensively tested. The goal is that sounds don't leak in or out. The testing of the studios is the work of an acoustician, who is walking around with an advanced decibel meter. He enters studios to measures the amount of noise that penetrates. To ensure that there are measurements to make, he has placed a 'noise suitcase' in one of the corridors. This flight case makes a loud rattling noise with 'stampers' on the concrete floor.
The acoustician closes the door of a studio and goes to work.