The self-noise of a cantilever blade tip model was measured in the open jet test section of the low-speed wind tunnel Braunschweig (NWB) of the German-Dutch Wind Tunnel consortium (DNW). This noise was measured using 10 free-field microphones, distributed equally facing each side of the model, and using a phased-microphone array facing its pressure side. Coherent output power resolved the dipole sound sources at low frequency, whereas the phased-microphone array indicate the presence of quadrupole noise source at the mid-frequency range, provided that the blade model is at a large near-stall angle of attack. The coherent output power technique enabled the evaluation of low frequency noise that was not achievable using the present microphone array.