The order included the following services:

• Drive-on concrete floor plate mounted on steel springs, tuning frequency 12.5 Hz
• Sound measurement room with a sound reduction index of 48 dB and a low-reflection flat absorber lining for free-field conditions with a lower cut-off frequency of 80 Hz
• Air-conditioning with water cooling and electric heating to maintain defined room temperatures of 19°C to 28°C
• The acoustic assessment was carried out by the ACC BU.

The soundproof booths were handed over to the customer on schedule.