NOVE TEHNOLOGIJE

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NOVE TEHNOLOGIJE

OdgovorNapisal/-a VCC » Če Maj 07, 2009 11:30 am

Danes sem opazil kon?no nekaj popolnoma novega na podro?ju proizvajanja zvoka, nanotehnologija v polnem zamahu. Pozabite diamante, berilij in ostalo! :mrgreen:

Flexible, Stretchable, Transparent Carbon Nanotube Thin Film Loudspeakers

Nano letters, 2008, 8/12, pp4539

http://pubs.acs.org/doi/full/10.1021/nl ... ookieSet=1

Na kratko in hitro: Vle?en tanek film sestavljajo ogljikove nanocevke, debelina je nekaj 10 nm. ?e film pripnemo med dve elektrodi, ter ju priklopimo na audio vir, postane CNT film transducer za zvok. Mehanizem nastanka zvoka je popolnoma druga?en kot pri vseh do sedaj opisanih zvo?nikih. CNT film NE vibrira, elektri?ni tok samo segreva CNT film, ta pa okoliški zrak. Ker je pa hitro segrevanje zraka adiabatni proces, se s spremembami temperature zraka pojavijo tudi spremembe tlaka, ki jih slišimo kot zvok. Zakaj je to možno? CNT film ima skrajno majhno maso in toplotno kapaciteto in zato lahko skrajno hitro odda svojo toploto (segreva) zraku, ta pa "zavibrira". CNT film ni omejen z velikostjo, je raztegljiv, prosojen in zmožen proizvajati tudi visoke zvo?ne pritiske. CNT film nima premikajo?ih se delov, kaj šele kakršnih koli magnetov.
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a ak » Če Maj 07, 2009 8:03 pm

Zanimivo...sicer si ?isto ne predstavljam, kako to dela (moram pogledat link), ampak malo sem skepti?en glede reprodukcije visokih frekvenc in glede visokih zvo?nih pritiskov.
?e res dela na principu segrevanja okoliškega zraka bo ena od pomembnejših lastnosti te zadeve prestop toplote iz filma na zrak. To pa je zadeva, ki je vsaj nekoliko odvisna od lastnosti zraka - recimo vlage in temperature. Obstaja "nevarnost", da bi bilo potrebno tak zvo?nik "kalibrirati" na trenutne klimatske razmere, da bi vedno dobili enak zvok. Seveda bi to lahko avtomatsko delala tudi kaka aktivna kretnica z mikrofonom...ali kaj podobnega.
OK...preve? ugibam, brez da bi zadevo sploh prebral... :oops:
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a kuzma2 » Če Maj 07, 2009 8:15 pm

Zanimivo- toda ali se spomnite piezo folije ,ki jo je delal Pioneer( slušalke) okrog leta 1980. Tanka folija napeta kot membrana, narejena po principu pieza- dve elektrodi in membrana je vibrirala- podobno kot ELS, toda ?ez par let je to izginilo zaradi nestabilnosti, ipd prakti?nih problemov- detajle sem že pozabil- dejstvo pa je, da se ni prijelo navkljub velikom obetom.
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a ak » Če Maj 07, 2009 8:42 pm

Spomnim se, da sem enkrat davno na internetu bral o nekem projektu "digitalnega zvo?nika" na neki univerzi. Zadeva naj bi bila modularna, modul pa bi bil nekakšna piezo spirala/valj ali nekaj podobnega, da bi se dosegel ve?ji u?inek raztezanja (detaljev se ne spomnim). Nato bi imel zvo?nik na sprednji stranici nameš?enih 255 takih modulov enega poleg drugega in bi spreminjal jakost zvo?nega pritiska tako, da bi glede na jakost vhodnega signala vklapljal razli?no število teh modulov...torej bi imel nekako 256 nivojev glasnosti (?e re?emo, da je tišina prvi novi).

po tistem nisem nikoli ve? slišal ni?esar o tej zadevi...je sploh kdo?
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a kuzma2 » Pe Maj 08, 2009 8:08 am

No ja, ?e je to že problem za elekroniko( digitaliziranje)- prepo?asno, kaj šele za mehaniko.
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a fotr » So Maj 09, 2009 9:18 pm

Na to "igrajo?o" zastavo sem nekje že naletel, se mi pa ponuja vprašanje: kakšne pa bodo morale biti vhodne naprave??
?e je edini princip segrevanje, bo še potrebno delati oja?evalce kable in ostalo v tako dragih cenovnih razredih??
?e bi to odpadlo in bi vrhunski zvok lahko dobil tudi s cenejšimi napravami, sem prepri?an, da teh zvo?nikov ne bodo NIKOLI delali!!!
Je audio lobi premo?en, da bi se odpovedal cvenku kar tako.

Vsekakor pa zanimiv izziv za bodo?nost.
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a ak » So Maj 09, 2009 10:15 pm

ufff, zdaj sem se šele uspel dokopat do teh sajtov...nekaj me je službena politika kukijev zafrkavala...Torej, zdaj sem šele uspel prebrati to?no, za kaj gre... :oops:

Pa ravno tisti dve zadevi, glede katerih sem bil najbolj skepti?en, pravijo, da imajo ti zvo?niki vrhunsko - namre? visoke zvo?ne pritiske in pa visoke frekvence (merili so do MHz?). Uauuu.

Torej, razen podvajanja frekvence skoraj ni slabe strani (no, ja, še zvo?ni pritisk oz. glasnost naraš?a s frekvenco) - zvo?nik, ki je idealen za bipolarca in/ali omnipolarca, pa nima impedance ampak samo ohmovo upornost, pa lahek, pa nima mehanike, pa lahko ga nalimaš na steno ali ekran ali ... hja, karkoli. Fantasti?no.

Sicer globoko v sebi še vedno ne morem prebroditi tistih visokofrekven?nih termi?nih procesov segrevanja in ohlajanja zraka...to mi po ob?utku nikakor ne sede...pa ne bo prvi?, da me je ob?utek varal. :lol:
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a kuzma2 » Ne Maj 10, 2009 8:04 am

Saj se podobno dogaja pri plazemskih zvo?nikih a deluje le pri visokih tonih.
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a VCC » Po Maj 11, 2009 6:31 am

ak napisal/-a:ufff, zdaj sem se šele uspel dokopat do teh sajtov...nekaj me je službena politika kukijev zafrkavala...Torej, zdaj sem šele uspel prebrati to?no, za kaj gre... :oops:


No kon?no je (vsaj) eden naredil doma?o nalogo, preden je komentiral :mrgreen: :mrgreen: :mrgreen: :mrgreen: Tako dela(mo)jo znanstevniki. Najprej prebereš ?lanek, pol pa si ustvariš mnenje, ne obratno. :D

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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a Rogouc » Po Maj 11, 2009 2:31 pm

Ja, tole zadevo so nam (System Fidelity-ju) ponudili pred kake pol leta, ?e bi nas zanimalo, pa sem odklonil. :D

Drži vsekakor, da zadeva nima premikajo?ih delo ker deluje na širjenju zraka okoli segrevajo?ih/ohlajajo?ih se trakcev. Drži tudi to, da je frekven?no teoreti?no skoraj neomejena, vendar...

Minusi:
- kar se usmerjenosti zvoka ti?e, je problem enak kot z elektrostati - za visoke frekvence mora biti površina majhna, za nizke pa velika. Zaradi tega izkoritek naraš?a s frekvenco, kar kli?e po ekvalizaciji, pa tudi usmerjenost je problemati?na. Zaradi tega je seveda povsem utopi?no pri?akovat, visoko reolucijo iz velikih panelov.

- zadeva lahko deluje izklju?no z oja?evalci A-single ended razredu. Pri tem je membrana vgrajena namesto bremena-izhodnega transformatorja. Namre?, ve?ji kot je tok skozi zaveso, bolj je razširjen zrak, manjši kot je tok, manj je razširjen zrak. To pa pomeni, da za zvo?nik s 100W zmožnostjo sinusne mo?i potrebujemo membrano ki ima že 'vgrajen' oja?evalnik v A-klasi, pri katerem se na membrani žge konstantno 200W v mirovnem toku ter enaka koli?ina mo?i tudi na oja?evalcu. ?e imamo še nekaj izgub po preostalem delu vezja, smo takoj na 500W konstantnega hajcanja po kanalu. 1000W segrevanja si pa v sobi nih?e ne želi. :D

- Ker s tako membrano ne moremo dose?i omembe vrednih basov, potrebujemo poleg frekven?ne ekvalizacije še subvufer, kar pa ni ravno v smeri kvalitete...

- pa še kaj bi se našlo... NXT paneli so bili tudi proglašeni za najve?je odkritje po izumu dinami?nega zvo?nika, pa jih zdaj nikjer ni. :D

Rogouc :P
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a Rogouc » Po Maj 11, 2009 2:45 pm

Aja, še nekaj zelo pomembnega sem pozabil:

- zaradi principa delovanja imamo na sponkah 'zavese' v mirovanju polovi?no napajalno napetost oja?evalnika, pod polno obremenitvijo pa kar celotno napetost, kar lahko nanese od 100 pa do krepko prek 200V, odvisno od konstrukcije. :shock: To pa vsekakor zahteva konkretno zaš?ito pred umrtjem od elektrike. :D

Upoštevajo? že samo to in nujnost vgrajenega namenskega oja?evalnika dela omenjeno zadevo precej manj privla?no...

Rogouc :P
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Re: NOVE TEHNOLOGIJE

OdgovorNapisal/-a VCC » Sr Maj 13, 2009 11:29 am

Rogouc napisal/-a:Ja, tole zadevo so nam (System Fidelity-ju) ponudili pred kake pol leta, ?e bi nas zanimalo, pa sem odklonil. :D
Rogouc :P


Glej glej, zdej pa vemo kdo je Rogouc. ON je tisti, ki je spravil na svet in v prodajo 7,5E4 krat ve? audio robe, kot "znani konstruktor" elektri?nih oja?eval. Daleko ve?, vsaj za ?ez Kitajski Zid. :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen:
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Re: NOVE TEHNOLOGIJE- DSD disc

OdgovorNapisal/-a administrator2 » Če Nov 19, 2009 5:16 pm

Info iz jesenskega RFMA 2009 v Denverju- za tiste, ki ste to zgrešili po raznih novicah:

Del članka iz Positive Feedback:

"Gus had hinted to me that he had a significant announcement just before the panel session started. When it came his turn, he startled me by saying that there was little known "DSD Disc" specification from Sony that would allow stereo DSD Discs to be produced without going through the SACD authoring/mastering system! Any Sony PS3 would play them as pure stereo DSD via the analog left/right RCA outputs using the PS3 RCA adapter! DSD-equipped Sony Vaios, too! Which meant that there was already an installed base of tens of millions of DSD Disc players! Not only that, but DSD Disc files were stored as ISO image files, and could be transported over the Internet (!!) and burned to DVD on any computer for playback on a local PS3(!!!) Apparently this has been a subset specification of the PS3 all along, but—unbelievably—Sony hasn't publicized it to either the industry or the general public. I am sorely… sorely, sorely...tempted to weld "completely clueless" to "Sony," but no, I'll resist.

Gus Skinas of the Super Audio Center: this was a man with some significant news….

Amazing!

After all these years of DSD being presented as a locked-down, non-transportable format and specification, incapable of downloading/burning, we were suddenly being told that there was a way to get stereo DSD punted about the planet in a very open-source friendly manner.

Sonoma workstations/toolsets or their equivalent are not outrageously expensive, but they do cost enough to keep many labels from acquiring them. And the cost of having DSD masters from various DSD recording systems (e.g., Sonoma, dCS, Tascam, Genex, Pyramix, and Korg) produced can be likewise daunting in these days of tight budgets and general cluelessness in the music biz. It's definitely overkill for most of the Indies, who might be mightily impressed by the musical quality of DSD (if they've heard it… most have not), but can only afford the cheap tools of PCM, with all the sonic limitations of lower resolution PCM. But with DSD Disc, an Indie could easily roll into, say, a Korg MR-1000, record DSD at either 5.6 mHz or 2.8224 mHz, and then go directly to stereo DSD on DSD Disc format, or distribute them via * on the Internet. Very spiffy!

A fresco of the Korg MR-1000 DSD recorder with integrated hard disk, supporting either 2.8224 mHz or 5.6 mHz sampling rates: very compact… DSD on the go! MA Recordings has been using the MR-1000 for its recordings recently, with spectacular results.

Needless to say, DSD Disc had caused a bit of a stir among the panelists. DSD in ISO, transportable over the Internet… supreme audio quality, with the ability to be handled on computers? This is really something. Will it develop legs in the marketplace? Good question. Charles Hansen said that while it would not be trivial, it would be possible to re-program the Ayre DAC to handle DSD, since DSD capability is embedded in its chipset. Once that was done, a simple firmware update would deploy the improvement. This would liberate audiophiles from their PS3s, and allow them to process stereo DSD via an asynch USB pipeline with a master clock, ensuring near-zero (perhaps actual zero?) jitter, instead of having to use AES/EBU or ST glass I/O.

And that, chilluns, would be quite the accomplishment.

Yep, it's real: the sample DSD Disc of David Elias' The Window… plays just fine on the PS3! This could allow DSD to enter the world of open standards and Internet/DVD burnable, without a doubt.

By the way: Gus gave me a sample DSD Disc…nothing less than David Elias' brilliant recording, The Window. I took it home and tried it right out on my PS3; it worked like a charm! All that you have to do is load the disc, go to the Music menu, and you'll see an icon labeled "DSD Disc"; click on it, and the tracks will load. Click on the first track, and away they go. Note: even PS3s that don't support SACD playback (like the one I have) WILL play DSD Discs.

And here's another interesting fact, one that Gus didn't know until I told him: My PS3 output the DSD Disc via HDMI as well as the analog outputs. When Gus and I talked about this, he was surprised that the HDMI audio output was working with the DSD Disc, but was sure that the output was DSD converted to PCM. HDMI does not necessarily convert DSD to PCM…there are several player/processor tandems that do handle bitstream via HDMI… but I'd agree with Gus that the PS3 is not doing this. Since there's no problem using the analog stereo RCAs to get DSD quality…simple will be better at this point when dealing with PS3s…we can go with it.

There are already some folks exploring DSD Disc support, including Ayre Acoustics, Oppo Digital, MA Recordings, and the Super Audio Center. Korg ought to become aware of this, as well. I've already received samples of DSD Discs from Todd Garfinkle of MA Recordings that sound absolutely terrific, so there is encouraging real world progress here. Todd may even be willing to sell you a sample DSD Disc if you bug him… of course, he still has a few copies of his stellar SACD sampler, MA on SA, which you simply must get if you love SACD. Check out his website at http://www.marecordings.com. I'll keep you informed about DSD Disc as I know more… stay tuned."

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Re: NOVE TEHNOLOGIJE- nov tip zapisa CES 2012

OdgovorNapisal/-a administrator2 » Če Jan 12, 2012 5:41 pm

Millenniata announced it received the Visionary Product Consumer Storage device award for their M Disc 1,000 year storage disc during the Storage Visions 2012 conference at the 2012 International Consumer Electronics Show for its M-DISC permanent storage technology that etches data onto a stone like material. M-DISC is on display today in booth 8 at Storage Visions and in the LG booth 8204 in Central Hall during CES. Millenniata launched the new optical disc technology ushering in a new era of information storage with its M-DISC and M-READY disc storage-technology that permanently etches data onto the write layer of the disc for use anytime and for generations to come without data lost. Millenniata also entered into a manufacturing and marketing partnership with Hitachi-LG Data Storage, Inc. to manufacture M-DISC compatible DVD drives under the LG brand. The M-DISC will not degrade over time and is usable on a daily basis. M-DISC is a perfect storage solution for music, photos, videos, genealogical records, business records, data loss prevention, permanent file backup, medical imaging, government usage, and for archival purposes. M-DISC optical discs are currently available through all of Millenniata's retail, reseller and distributor partners and through the Millenniata website. LG-branded M-DISC compatible DVD drives are available online. Drive availability will steadily increase throughout 2012. The M-DISC is the first backward compatible non-dye based DVD optical technology constructed of inorganic materials that are known to last centuries. M-DISC compatible drives are a high quality optical drive specifically designed to laser-etch digital information onto the M-DISC. This combination allows information to be written once and read over time and offers perhaps the best permanent data storage solution in the industry.
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