. . . . . "Praha" . "RIV/68407700:21220/05:02107802!RIV06-MSM-21220___" . . "air-conditioning; duct acoustic; noise of damper"@en . . . "2"^^ . "Aerodynamic Sound by Low Mach Numbers" . "21220" . "Air conditioning equipment ensures thermal comfort in important public buildings such as hospitals, theatres, concert halls, TV and broadcasting studios. In all these cases the indoor spaces are very demanding with respect to holding the level of noise within the required limits. Air conditioning pipe manifolds in the above buildings are terminated by inlets and outlets, which serve for the uniform supply of air. Outlets together with control elements (predominantly butterfly dampers) are in addition to the above sources of aerodynamic noise. Usually there is not enough space to reduce the noise by means of sound dampers. The aim of the present paper, which is the result of an implemented research project, is to consider possibilities of the reduction of aerodynamic noise already in the control elements themselves."@en . "2"^^ . . "Aerodynamic Sound by Low Mach Numbers"@en . . "neuvedeno" . . "511491" . . "RIV/68407700:21220/05:02107802" . "Ku\u010Dera, Miroslav" . . . "Aerodynamick\u00E9 zdroje hluku p\u0159i n\u00EDzk\u00FDch Machov\u00FDch \u010D\u00EDslech"@cs . "[F97CC5EE9301]" . . . "Aerodynamic Sound by Low Mach Numbers" . . "Air conditioning equipment ensures thermal comfort in important public buildings such as hospitals, theatres, concert halls, TV and broadcasting studios. In all these cases the indoor spaces are very demanding with respect to holding the level of noise within the required limits. Air conditioning pipe manifolds in the above buildings are terminated by inlets and outlets, which serve for the uniform supply of air. Outlets together with control elements (predominantly butterfly dampers) are in addition to the above sources of aerodynamic noise. Usually there is not enough space to reduce the noise by means of sound dampers. The aim of the present paper, which is the result of an implemented research project, is to consider possibilities of the reduction of aerodynamic noise already in the control elements themselves." . "Z(MSM6840770011)" . "Klimatiza\u010Dn\u00ED za\u0159\u00EDzen\u00ED zaji\u0161\u0165uj\u00ED tepelnou pohodu prost\u0159ed\u00ED ve v\u00FDznamn\u00FDch objektech jako jsou nemocnice, divadla, koncertn\u00ED s\u00E1ly, rozhlasov\u00E1 a televizn\u00ED studia apod. Jedn\u00E1 se ve v\u0161ech p\u0159\u00EDpadech o velice n\u00E1ro\u010Dn\u00E9 prostory z hlediska nezbytn\u00E9ho dodr\u017Een\u00ED po\u017Eadovan\u00FDch hlukov\u00FDch limit\u016F. Vzduchotechnick\u00E9 potrubn\u00ED rozvody jsou ve vyjmenovan\u00FDch prostorech zakon\u010Deny p\u0159iv\u00E1d\u011Bc\u00EDmi a odv\u00E1d\u011Bc\u00EDmi vy\u00FAstkami, kter\u00E9 maj\u00ED za \u00FAkol zajistit rovnom\u011Brn\u00FD p\u0159\u00EDvod vzduchu. Vy\u00FAstky spolu s regula\u010Dn\u00EDmi org\u00E1ny (v\u011Bt\u0161inou se jedn\u00E1 o jednolist\u00E9 klapky) se p\u0159i pr\u016Ftoku vzduchu st\u00E1vaj\u00ED krom\u011B ji\u017E uveden\u00E9ho zdroji aerodynamick\u00E9ho hluku. Na potla\u010Den\u00ED tohoto hluku pomoc\u00ED tlumi\u010D\u016F hluku ji\u017E nen\u00ED v naprost\u00E9 v\u011Bt\u0161in\u011B p\u0159\u00EDpad\u016F prostor. C\u00EDlem tohoto refer\u00E1tu, kter\u00FD vypl\u00FDv\u00E1 z \u0159e\u0161en\u00E9ho v\u00FDzkumn\u00E9ho \u00FAkolu, je zhodnotit mo\u017Enosti potla\u010Den\u00ED aerodynamick\u00E9ho hluku ji\u017E uveden\u00FDch regula\u010Dn\u00EDch org\u00E1n\u016F. ."@cs . "80-01-03201-9" . "Aerodynamick\u00E9 zdroje hluku p\u0159i n\u00EDzk\u00FDch Machov\u00FDch \u010D\u00EDslech"@cs . "Aerodynamic Sound by Low Mach Numbers"@en . "Nov\u00FD, Richard" .