A hearing aid adapted for being located in an operational position at or in or behind an ear or fully or partially implanted in the head of a user, the hearing aid comprising • first and second microphones ( M 1, M 2; M BTE1, M BTE2) for converting an input sound to first IN 1 and second IN 2 electric input signals, respectively, • a memory comprising ∘ a first set of complex frequency dependent weighting parameters W o1 (k), W o2 (k) representing a first beam pattern, where k is a frequency index, k=1, 2,..., K, ∘ a second set of complex frequency dependent weighting parameters W c1 (k), W c2 (k) representing a second beam pattern, and ∘ a fixed adaptation parameter β fix (k) representing a third, fixed beam pattern, • a processing unit for providing an adaptively determined adaptation parameter β opt (k) representing an adaptive beam pattern configured to attenuate unwanted noise under the constraint that sound from a target direction is essentially unaltered, • a mixing unit (BETA-MIX) configured to provide a resulting complex, frequency dependent adaptation parameter β mix (k) as a combination of said fixed frequency dependent adaptation parameter β fix (k) and said adaptively determined frequency dependent adaptation parameter β opt (k), • a resulting beamformer for providing a resulting beamformed signal Y BF based on said first and second electric input signals IN 1 and IN 2, said first and second sets of complex frequency dependent weighting parameters W o1 (k), W o2 (k) and W c1 (k), W c2 (k), and said resulting complex, frequency dependent adaptation parameter β mix (k). • first and second microphones ( M 1, M 2; M BTE1, M BTE2) for converting an input sound to first IN 1 and second IN 2 electric input signals, respectively, • a memory comprising ∘ a first set of complex frequency dependent weighting parameters W o1 (k), W o2 (k) representing a first beam pattern, where k is a frequency index, k=1, 2,..., K, ∘ a second set of complex frequency dependent weighting parameters W c1 (k), W c2 (k) representing a second beam pattern, and ∘ a fixed adaptation parameter β fix (k) representing a third, fixed beam pattern, ∘ a first set of complex frequency dependent weighting parameters W o1 (k), W o2 (k) representing a first beam pattern, where k is a frequency index, k=1, 2,..., K, ∘ a second set of complex frequency dependent weighting parameters W c1 (k), W c2 (k) representing a second beam pattern, and ∘ a fixed adaptation parameter β fix (k) representing a third, fixed beam pattern, • a processing unit for providing an adaptively determined adaptation parameter β opt (k) representing an adaptive beam pattern configured to attenuate unwanted noise under the constraint that sound from a target direction is essentially unaltered, • a mixing unit (BETA-MIX) configured to provide a resulting complex, frequency dependent adaptation parameter β mix (k) as a combination of said fixed frequency dependent adaptation parameter β fix (k) and said adaptively determined frequency dependent adaptation parameter β opt (k), • a resulting beamformer for providing a resulting beamformed signal Y BF based on said first and second electric input signals IN 1 and IN 2, said first and second sets of complex frequency dependent weighting parameters W o1 (k), W o2 (k) and W c1 (k), W c2 (k), and said resulting complex, frequency dependent adaptation parameter β mix (k).