Quantitative source spectra from acoustic array measurements
Ennes Sarradj · 2008
While phased microphone arrays are often applied with the focus on acoustic source localization, in many cases quantitative source information is also needed. The estimation of quantitative source spectra from array measurements is not straightforward and a number of methods exist that either use integration of the beamforming map or solve inverse problems for source estimation. An alternative, computationally efficient method is proposed that is based on a signal subspace approach. A short overview of the theory is given and the method is demonstrated using two examples, a four loudspeaker set-up and trailing edge noise measurement.