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Old 20-01-2010, 04:34 PM   #21
boggy
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Default Re: 120Hz problem

Quote:
Originally Posted by Solozabal View Post
"A thin wood panel faced box with fiberglass inside is also a pressure bass trap, usually getting a 30% efficiency or less, (compare to the efficiency of a TubeTrap that is upwards of 150%)..." Arthur Noxon

Ako rade 5 puta bolje onda se mo?e i zanemariti neozbiljnost njihova
izgleda .
ima smisla...

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Old 20-01-2010, 11:56 PM   #22
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Default Re: 120Hz problem

e ako je tako stvarno ima smisla
...ti procenti... teorija... marketing...

evo jednostavno (primjer na brzo, možeš da ideš i na gik acoustics stranicu i vidiš slične dosta impozantne rezultate

gledaj performanse i nadaj se da su mjeritve objektivne (ispod 100Hz nije ništa objektivno btw, nego bolje je ako mjeriš konkretan akustički tretiran prostor...) ali ipak primjeraj ako imaš previše vremena:

http://www.asc-studio-acoustics.com/...trap-flyer.pdf
http://www.realtraps.com/data.htm (gledaj tabelu "MondoTrap In Corner" da te ne zbune Sabini i alfa absorpcijski koeficient...) i modularni superchunks princip http://www.realtraps.com/p_megatraps.htm

Mondotrap i megatraps je "flat" membranski absorber sa dosta tankom plastičnom membranom...

A tek ovaj licenciran "fraunhofer-ov" princip sa pistoničnom metalnom membranom:
http://www.rpginc.com/products/modex...-Broadband.pdf
http://www.rpginc.com/products/modexplate/index.htm
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Old 21-01-2010, 01:04 PM   #23
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Default Re: 120Hz problem

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e ako je tako stvarno ima smisla
...ti procenti... teorija... marketing...
Svako svog konja hvali...istina..., a nama jedino ostaje DIY i nada...
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Old 21-01-2010, 02:55 PM   #24
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Default Re: 120Hz problem

i ono što je najeftinije vrlo slično učinkovito zato ne vidim dileme
A ako hočeš da se zafrkavaš sa tube trapsima izvoli ali neče biti ništa očito bolje od dobrog ravnog panela.

Ima još neka uspoređivanja absorpcije niskih (nemam linka, negdje bilo na studiotips ili gdje je več prije nekoliko vremena...) i ako praviš flat panel od 10-15cm debele guste vune (80-130kg/3) (dimenzija 120x60cm), nekoliko učinkovitiji je superchunks (oko 20-30%) (120 visok in 60cm prednja površina, popunjen odpozadi), a tube traps praktički konkurira kada ima diameter od cca. 60cm x 120cm visine.

Nadam se da če ti biti dovoljno informativno za početak.

Ali sve se na kraju svede kakve materijale koristiš kod tube trapsova (gustina, debelina, volumen...), pa i ako češ koristiti membranu koja mora biti baš prava/pravilno izabrana sa kombinacijom ostalih materijala...
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Old 21-01-2010, 04:56 PM   #25
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Default Re: 120Hz problem

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i ako praviš flat panel od 10-15cm debele guste vune (80-130kg/3) (dimenzija 120x60cm), nekoliko učinkovitiji je superchunks (oko 20-30%) ...
Vec imam 4 panela u kutevima (dimenzija 250x60) napunjena 15cm
gustom kamenom vunom, ali to je jos daleko od "idealnog" zato
razmisljam o dodavanju jos par tube trapova koje bih postavio odmah
do ovih mrcina..

Last edited by Solozabal; 21-01-2010 at 04:58 PM.
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Old 21-01-2010, 05:10 PM   #26
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Default Re: 120Hz problem

pa dobro kako hoče? ako ti je volja, samo neka ima tube traps onda debele stijene i koliko ide gustu vunu pa da se jo? mo?e da se savije...
Ima? jo? vi?e kutova po prostoru, svega skupa 12, a praktičnih (izzuzev one na podu) 8... odnosno jo? 4 (priporučljivo da povuče? absorpcijski materijal po cijelim du?inama kutova...).
Kad zavr?i? nabaci koju sličicu, a mo?e i kakvu mjeritvu before/after.
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Old 21-01-2010, 09:01 PM   #27
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Default Re: 120Hz problem

Slazem se s Nenadom, moj post gore je bio (izgleda neuspesan) pokusaj sprdnje na temu tube traps...

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