A method of generating a directional output signal from sound received by at least two microphones arranged as microphone array, said method comprising: transforming the sound received by each of said microphones and represented by analog-to-digital converted time-domain signals provided by each of said microphones into corresponding complex-valued frequency-domain microphone signals each having a frequency component value for each of a plurality of frequency components; calculating for a Beam Focus Direction a Beam Focus Spectrum, by: calculating, for each of the plurality of frequency components, real-valued Beam Spectra values from the complex-valued frequency-domain microphone signals for the Beam Focus Direction by means of predefined, microphone-specific, time-constant, complex-valued Transfer Functions; applying, for each of the plurality of frequency components, a Characteristic Function to each real-valued Beam Spectra value, wherein the Characteristic Function assigns each real-valued Beam Spectra value to a corresponding real-valued Characteristic Function value having a value between zero and one; and determining the Beam Focus Spectrum, F(f), by calculating, for each frequency of the plurality of frequency components, F f = ∏ i = 1 o C B i f, wherein i = 1.. o ≤ n with n + 1 being a total number of microphones of the at least two microphones, and o + 1 being a number of microphones of the at least two microphones that pairwise contribute to the Beam Focus Spectrum, and wherein C(B i (f)) are the real-valued Characteristic Function values and B i (f) are the real-valued Beam Spectra values; using each component of the Beam Focus Spectrum as attenuation factor for a frequency component of the plurality of frequency components; multiplying, for each of the plurality of frequency components, the attenuation factor with the frequency component value of the complex-valued frequency-domain microphone signal of one of said microphones to obtain a directional frequency component value; and forming a frequency-domain directional output signal from the directional frequency component values for each of the plurality of frequency components. transforming the sound received by each of said microphones and represented by analog-to-digital converted time-domain signals provided by each of said microphones into corresponding complex-valued frequency-domain microphone signals each having a frequency component value for each of a plurality of frequency components; calculating for a Beam Focus Direction a Beam Focus Spectrum, by: calculating, for each of the plurality of frequency components, real-valued Beam Spectra values from the complex-valued frequency-domain microphone signals for the Beam Focus Direction by means of predefined, microphone-specific, time-constant, complex-valued Transfer Functions; applying, for each of the plurality of frequency components, a Characteristic Function to each real-valued Beam Spectra value, wherein the Characteristic Function assigns each real-valued Beam Spectra value to a corresponding real-valued Characteristic Function value having a value between zero and one; and determining the Beam Focus Spectrum, F(f), by calculating, for each frequency of the plurality of frequency components, F f = ∏ i = 1 o C B i f, wherein i = 1.. o ≤ n with n + 1 being a total number of microphones of the at least two microphones, and o + 1 being a number of microphones of the at least two microphones that pairwise contribute to the Beam Focus Spectrum, and wherein C(B i (f)) are the real-valued Characteristic Function values and B i (f) are the real-valued Beam Spectra values; calculating, for each of the plurality of frequency components, real-valued Beam Spectra values from the complex-valued frequency-domain microphone signals for the Beam Focus Direction by means of predefined, microphone-specific, time-constant, complex-valued Transfer Functions; applying, for each of the plurality of frequency components, a Characteristic Function to each real-valued Beam Spectra value, wherein the Characteristic Function assigns each real-valued Beam Spectra value to a corresponding real-valued Characteristic Function value having a value between zero and one; and determining the Beam Focus Spectrum, F(f), by calculating, for each frequency of the plurality of frequency components, F f = ∏ i = 1 o C B i f, wherein i = 1.. o ≤ n with n + 1 being a total number of microphones of the at least two microphones, and o + 1 being a number of microphones of the at least two microphones that pairwise contribute to the Beam Focus Spectrum, and wherein C(B i (f)) are the real-valued Characteristic Function values and B i (f) are the real-valued Beam Spectra values; using each component of the Beam Focus Spectrum as attenuation factor for a frequency component of the plurality of frequency components; multiplying, for each of the plurality of frequency components, the attenuation factor with the frequency component value of the complex-valued frequency-domain microphone signal of one of said microphones to obtain a directional frequency component value; and forming a frequency-domain directional output signal from the directional frequency component values for each of the plurality of frequency components.