Technical specifications of the sound measurement room:

• Test box with sound insulation to the outside
• Pyramid-shaped sound absorbers for a lower cut-off frequency of approx. 1000 Hz
• Vibration-damped foundation

Technical specifications of the measurement equipment:

• Condenser microphones in an arc-shaped arrangement with constant spacing for assessing directional characteristics
• Sound intensity probe that is position controlled from outside the test box
• High-resolution camera with high frame rate

Technical specifications of the propeller test rig:

• Sensors for measuring thrust, torque, rotational speed, electrical power and temperature
• Maximum thrust of 150N at a maximum input power of 2.5 kW
• The test bench is controlled via a software program from outside the test box