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Measurement and evaluation of room impulse response measurements performed with a flexible highly directive source

Authors Perez Palacios, A.
Year 2014
Thesis Type Master's thesis
Topic Audio Signal Processing
Keywords regularization, directivity, spherical harmonics
Abstract The digital era has opened a number of fields in acoustics like the auralisation of enclosures. Usually, room impulse responses measured with a dodecahedron loudspeaker are convolved with a dry music or speech signal to create the auralize the dry signal. Since the room impulse response is primarily defined by the source, the synthesis of room impulse responses for arbitrary sources is a major research topic in acoustics. In this work, a new method of room impulse response synthesis developed at the Institute of Technical Acoustics in Aachen has been evaluated. The hardware consists of a wooden spherical measurement source, on which surface 28 transducers are placed. The radiation characteristics of each of the transducers was measured in a semi anechoic chamber to analyse the behaviour of the measurement source. Based on these results, the feasibility of the synthesis was studied.
Supervisors Zotter, F., Pollow, M., Klein, J.