This paper presents the acoustic qualification of the new ECL-B3 test-rig at École Centrale de Lyon in France. This new experimental facility is part of the PHARE project, which is supported by the French National Research Agency through the EquipEx program. The testrig was designed and manufactured together by Safran Aircraft Engines and École Centrale de Lyon for aeroacoustic tests of a reduced-scale fan stage, and can support a wide range of R&D studies using state-of-the-art equipment and instrumentation, such as turbulence control screen, pole rakes, hot-wires, particle image velocimetry, pressure transducers, and internal and external microphone arrays, among others. These will allow for a better understanding of aeroacoustic phenomena in future fan stages, such as the influence of inflow distortion, aerodynamic instabilities due to rotating stall and surge, and noise generation and propagation. Furthermore, the high-speed acquisition system that has been set up in the test facility is suitable for highly instrumented aeroacoustic measurements. For instance, up to 192 microphones can be installed simultaneously. Commissioning tests have been performed using a 20" fan stage designed and manufactured by Safran Aircraft Engines. Preliminary results indicate that this facility can provide state-of-the-art aeroacoustic measurements (low inlet distorsion, low background noise levels, ...), and can be useful for advanced aeroacoustic tests of modular fan stages. Thus, the ECL-B3 facility is suitable for the maturation of noise reduction technologies up to technology readiness level of the order of 3 to 4.