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Old 07-02-2011, 10:14 PM   #321
boggy
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Default Re: DIY Vocal booth & Control room?!

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Originally Posted by analog View Post
Mislim da će mu za to trebati besplatni plugin za Sketchup, VolumeCalculator.
http://www.cad-addict.com/2008/11/sk...alculator.html
Hm... moguce...

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Old 07-02-2011, 11:08 PM   #322
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Default Re: DIY Vocal booth & Control room?!

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Eomsy, ako ces prikazivati rezultate po EBU standardima, moras uraditi i smoothing krivulje od 1/3 oktave.... potrazi u REW tu opciju i ponovo postuj slike sa tako zaravnjenim odzivom. Svidelo se to nama ili ne to govori standard. I tada ce prikaz na pojedinim opsezima biti puno bolji od +/-5dB (odnosno tacnije +/-10dB sto je rekao Nenad)

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@Eomsy
S kojim si smothing omjerom napravio ono prvo mjerenje (none ili) ?

@boggy
Da li se zna koliko po standardu (smoothing 1/3) mora biti odstupanje da bi krivulja bila zadovoljavajuca?
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Old 07-02-2011, 11:13 PM   #323
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Default Re: DIY Vocal booth & Control room?!

Quote:
Originally Posted by Solozabal View Post
@Eomsy
S kojim si smothing omjerom napravio ono prvo mjerenje (none ili) ?
Trazio sam da stavi 1/3 oktave (tako pise u standardu)

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.............
@boggy
Da li se zna koliko po standardu (smoothing 1/3) mora biti odstupanje da bi krivulja bila zadovoljavajuca?
o da.... o tome smo nadugacko i nasiroko pricali u ovom threadu: "Vreme reverberacije (RT60) u kontrolnim sobama"

Tu ima vise izvora dokumenata, cak i nesto zucnije polemike... ali to je to... EBU/AES/ITU.... svetske/evropske organizacije... prilicno slozne u svojim preporukama... linkovali smo i doticne dokumente koji su mozda i opsirniji nego sto ocekujes.

Ukratko... u vecem delu opsega je +/-3dB

Upozorenje (za svaki slucaj): sastavili su standard po kome se nesto moze proglasiti "tehnicki ispravnim" ali daleko od toga da to znaci da ta soba dobro radi... isto kao i sa snimkom... "tehnicki ispravan snimak" je minimum koji snimak mora da zadovoljava.... i to je sve.


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Old 07-02-2011, 11:29 PM   #324
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Default Re: DIY Vocal booth & Control room?!

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Trazio sam da stavi 1/3 oktave (tako pise u standardu)
Mislio sam na ono mjerenje sa 30te stranice, da li je to isto 1/3 oktave?

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Ukratko... u vecem delu opsega je +/-3dB

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Tnx
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Old 07-02-2011, 11:31 PM   #325
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Default Re: DIY Vocal booth & Control room?!

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Mislio sam na ono mjerenje sa 30te stranice, da li je to isto 1/3 oktave?
Sa pocetka je verovatno 1/48 oktave
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Tnx
np

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Old 08-02-2011, 06:54 PM   #326
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Default Re: DIY Vocal booth & Control room?!

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Mislio sam na ono mjerenje sa 30te stranice, da li je to isto 1/3 oktave?



Tnx
30ta stranica kojeg dokumenta?
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Old 08-02-2011, 07:10 PM   #327
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Default Re: DIY Vocal booth & Control room?!

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30ta stranica kojeg dokumenta?
30ta stranica ovog threada
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Old 08-02-2011, 07:12 PM   #328
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Default Re: DIY Vocal booth & Control room?!

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Originally Posted by Solozabal View Post
Mislio sam na ono mjerenje sa 30te stranice, da li je to isto 1/3 oktave?
To je na "none"

@NLP .... Solozabal misli na 30-tu stranicu moga threada ...

@ Analog ... TNX, ba? bum download-ao ,ali sam to ipak iskalkulirao (otprilike kako mi je Boggy rekao) manualno ...

No, ajmo dalje. Evo slikice uvećane da se vidi koliko je točno odskakanje u dB ...



I usporedba prvoga sweet spota i drugoga (sada?njeg) ...




Kaj po ovome mogu zaključiti da treba tretirati samo 88 Hz-a ?

Ajmo dalje. Po?to mi ba? moji izračuni ne ispadaju ba? dobri (čitaj ne ?IMKU ba? najbolje), koliki bi mi trebao biti RT60 u sobi ako mi je ostalo volumena 25,05 m3 ? Malo sam danas mjerio pa mi toliko ispalo ...
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Old 08-02-2011, 07:19 PM   #329
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Default Re: DIY Vocal booth & Control room?!

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............
Ajmo dalje. Pošto mi baš moji izračuni ne ispadaju baš dobri (čitaj ne ŽIMKU baš najbolje), koliki bi mi trebao biti RT60 u sobi ako mi je ostalo volumena 25,05 m3 ? Malo sam danas mjerio pa mi toliko ispalo ...
po mojoj racunici tebi je preporuceni Tm=0.1576s=157.6ms
formula je Tm=0.25*(V/Vr)^1/3, Vr=100m3
Nek sracunaju i ostali da nisam nesto zabrljao.

opis je ovde http://www.rumski.com/forum/showthre...449#post293449

pozdrav

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Old 08-02-2011, 07:24 PM   #330
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Default Re: DIY Vocal booth & Control room?!

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po mojoj racunici tebi je preporuceni Tm=0.1576s=157.6ms
formula je Tm=0.25*(V/Vr)^1/3, Vr=100m3
Nek sracunaju i ostali da nisam nesto zabrljao.

opis je ovde http://www.rumski.com/forum/showthre...449#post293449

pozdrav

bogi
Ma vidio ja to, ali mi izračuni ne?to nisu bili takvi ... No ovo bi bio pokazatelj da sam "tu negdje" sa grafa RT60 na strani 32 ...
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