Automatic Calibration and Equalization of a Line Array System

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Välimäki, Vesa Vidal Wagner, Fernando 2015-09-18T08:40:51Z 2015-09-18T08:40:51Z 2015-08-24
dc.description.abstract This final project presents an automated Public Address processing unit, using delay and magnitude frequency response adjustment. The aim is to achieve a flat frequency response and delay adjustment between different physically-placed speakers at the measuring point, which is nowadays usually made manually by the sound technician. The adjustment is obtained using four signal processing operations to the audio signal: time delay adjustment, crossover filtering, gain adjustment, and graphic equalization. The automation is in the calculation of different parameter sets: estimation of the time delay, the selection of a suitable crossover frequency, and calculation of the gains for a third-octave graphic equalizer. These automatic methods reduce time and effort in the calibration of line-array PA systems, since only three sine sweeps must be played though the sound system. For verifying the functioning of the system, both simulated signals and measurements have been conducted. A 1:10 scale model of a line array system has been designed and constructed in an anechoic chamber to test the automatic calibration and equalization methods and the results are analyzed. en
dc.format.extent 69+6
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Automatic Calibration and Equalization of a Line Array System en Sähkötekniikan korkeakoulu fi
dc.subject.keyword line array en
dc.subject.keyword public adress en
dc.subject.keyword crossover filtering en
dc.subject.keyword delay adjustment en
dc.subject.keyword graphic equalization en
dc.subject.keyword automation en
dc.identifier.urn URN:NBN:fi:aalto-201509184337
dc.programme.major Acoustics and audio signal processing fi
dc.programme.mcode S-89 fi
dc.contributor.supervisor Välimäki, Vesa
dc.programme TLT - Master’s Programme in Communications Engineering (TS2005) fi
dc.location P1 fi

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