Catalogue PHZE
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acoustic louvres

Bird protection grid in detail: Acoustic louvres "PHZE" are made of plain galvanized steel or powder coated RAL (stainless steel or AlMg3 available upon reques). The louvres are filled with sound absorbing material covered with perforated metal plate for increased effectivity. There are 4 different depths available according to desired attenuation. The air inlets are equipped with bird protection grids as standard. Construction angle of the sound absorbing blades allows also the installation as an end piece of an air duct (direct installation or with a frame). Acoustic louvres are used for...

200 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by...

300 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by...

400 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by...

600 Lv = desired accoustic pressure at defined point Lpv = noise dispersion in the air duct reduced by the attenuation "D" of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= level of the louvre acoustic output at air speed given just before the louvre R = distance of the point from the core of the louvre "m" Q = directional coefficient (determined by...

Methodics of designing acoustic louver Lv = desired accoustic pressure at defined point Lpv = oise dispersion in the air duct reduced by teh attenuation "D" n of the acoustic louvre and routing Lpž = self noise of the louvre dL = correction of reverberation noise in the outside (constant = 3) Lwž(A) = Lw (diagram) + ∆ Lw + Lwa + Lwa oct Lw1 = sound power lever of the system "dB(A)" LwA = sound power of the noise source "dB(A)" Dt = attenuation of the transmission D = louvre attenuation Lwž(A)= sound power level of the louvre at defined air stream speed right in front of the louvre R =...

calculatioN Software In order to simplify the selection of the louvres and other insulating products based on the complex noise situation and the source of the noise, the manufacturer created the computer software Cell silencers JTHE VLASTNÍ HLUK TLUMIČŮ HLUKU Vlastní hluk tlumičů Glideow je s porovnáním s tlumiči standardní konstrukce výrazně nižší, který je zajištěn díky speciální aerodynamickému tvaru tlumiče. Vlastní hluk tlumičů hluku je měřen dle CSN ISO 7235 akreditovanou akustickou laboratoří. Uvedená data jsou platná pro 1m2 plochy. MONTÁŽ TLUMIČŮ DO POTRUBÍ - SPOJOVÁNÍ A KOTVENÍ...