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Zmanjševanje vpliva akustične povratne zanke v sistemih za aktivno dušenje hrupa : doktorsko deloPrezelj, Jurij, strojnikV uvodnem delu so predstavljene teoretične osnove akustike v kanalih in digitalne obdelave signalov. Opisane so tudi osnove brezzančnega sistema za aktivno dušenje hrupa, ki se najpogosteje uporablja ... v prezračevalnih sistemih. Identificiran je glavni problem sistemov za aktivno dušenje hrupa, to je akustična povratna zanka. Do sedaj je bilo predstavljenih že veliko metod za reševanje tega problema. Večina metod vsebuje kompleksno obdelavo signalov ali pa za delovanje potrebuje več mikrofonov ali zvočnikov. V našem delu smo pristopili k reševanju problema akustične povratne zanke z uporabo usmerjenih zvočnih virov. Razvili smo novo konstrukcijo zvočnega vira, ki brez obdelave signalov in z enim samim zvočnikom dosega visoko stopnjo usmerjenosti. Dodatna prednost novih zvočnih virov je, da preprečuje širjenje valovanja po kanalu, tudi če sistem za aktivno dušenje hrupa ne deluje. Frekvenčni odziv novih konstrukcij smo kompenzirali z digitalnimi siti, ki so del vsakega sistema za aktivno dušenje hrupa. Rezultati simulacij so pokazali, da predlagana konstrukcija zvočnega vira pripomore k doseganju višjih prenosnih izgub sistema za aktivno dušenje hrupa, istočasno pa skrajša čas konvergence njegovemu adaptivnemu algoritmu.Type of material - dissertation ; adult, seriousPublication and manufacture - Ljubljana : [J. Prezelj], 2006Language - slovenianCOBISS.SI-ID - 9271835
Author
Prezelj, Jurij, strojnik
Other authors
Čudina, Mirko
Topics
Akustika |
Disertacije |
Hrup |
Disertacije |
prezračevalni kanali |
aktivno dušenje hrupa |
dekonvolucija |
adaptivni algoritmi |
digitalna obdelava signalov |
impulzni odziv akustične poti |
stoječe valovanje |
usmerjeni zvočni vir
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Prezelj, Jurij, strojnik | 20857 |
Čudina, Mirko | 03569 |
Source: Personal bibliographies
and: SICRIS
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