odbojka
http://14odbojka.blog.rs/blog/14odbojka
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Zvuk
<p><strong>Звук</strong> је механичка осцилација честица неког еластичног медијума које са кроз њега најчешће простиру као <a class="mw-disambig" href="http://sr.wikipedia.org/wiki/%D0%A2%D0%B0%D0%BB%D0%B0%D1%81" title="Талас">талас</a> и које (углавном) човек чује. Човеков орган слуха може да региструје осцилације у <a href="http://sr.wikipedia.org/wiki/%D0%A4%D1%80%D0%B5%D0%BA%D0%B2%D0%B5%D0%BD%D1%86%D0%B8%D1%98%D0%B0" title="Фреквенција">фреквенцијском</a>
опсегу од 16 Hz до 20.000 Hz ако оне имају довољни интензитет. Звук се
простире кроз медијуме у сва три агрегатна стања. Звук не може да се
простире у безвадушном простору. Под звуком се подразумевају и
осцилације изван напред наведеног фреквенцијског опсега: <a href="http://sr.wikipedia.org/wiki/Infrazvuk" title="Infrazvuk">инфразвук</a> испод 16 Hz и <a href="http://sr.wikipedia.org/wiki/Ultrazvuk" title="Ultrazvuk">ултразвук</a> изнад 20.000 Hz.</p>
<p>Област <a href="http://sr.wikipedia.org/wiki/%D0%A4%D0%B8%D0%B7%D0%B8%D0%BA%D0%B0" title="Физика">физике</a> која проучава звук зове се <a href="http://sr.wikipedia.org/wiki/%D0%90%D0%BA%D1%83%D1%81%D1%82%D0%B8%D0%BA%D0%B0" title="Акустика">акустика</a>.</p>
<p>Брзина звука зависи од карактеристика флуида и може се израчунати по релацији:</p>
<center><img class="mwe-math-fallback-png-inline tex" src="http://upload.wikimedia.org/math/8/c/e/8ce957b14781dc52e3f25e4ae3c6e457.png" border="0" alt="c = \sqrt{\frac{p_a \chi}{\rho}}" /><br /><div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">Zvučni
zapisi zauzimaju podosta mesta na računaru pa treba uzeti u obzir da se na webu
nalaze što manje zvučne datoteke kako bi se stranica što pre učitala i kako bi se
što pre skinuli podaci na računar. Redukovanjem veličine zapisa smanjuje se i kvalitet
zvuka. 22 kHz, 8 bit mono kvalitet zvuka upotrebljava se kao standardni format slabijeg
kvaliteta zvuka i obično je dosta kvalitetan za govor. </span></div>
<table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse: collapse">
<tbody>
<tr style="height: 5.2pt">
<td colspan="3" style="border: 1pt inset; height: 5.2pt; padding: 0in; width: 371.4pt" valign="top" width="619">
<div class="MsoNormal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">CD"
kvalitet zvuka </span></div>
</td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">44
kHz </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">16
bit Stereo </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">10.3
MB </span></div>
</td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">44
kHz </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">8
bit Stereo </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">5.18
MB </span></div>
</td>
</tr>
<tr>
<td colspan="3" style="border: 1pt inset; padding: 0in; width: 371.4pt" valign="top" width="619">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">"FM"
radio kvalitet zvuka </span></div>
</td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">22
kHz </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">16
bit Stereo </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">5.18
MB </span></div>
</td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">22
kHz </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">8
bit Stereo </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">2.59
MB </span></div>
</td>
</tr>
<tr>
<td colspan="3" style="border: 1pt inset; padding: 0in; width: 371.4pt" valign="top" width="619">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">"AM"
radio kvaliteta zvuka </span></div>
</td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">11
kHz </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">16
bit Stereo </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">2.59
MB </span></div>
</td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">11
kHz </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">8
bit Stereo </span></div>
</td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206">
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">1.29
MB </span></div>
</td>
</tr>
</tbody></table>
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">Za
komprimovanje audio datoteka potrebna je specijalna šema komprimovanja zvana kodek
(<em>codec</em>). Najpoznatiji audio kodeci su: <em>Lame MP3 audio codec & exe</em>,
<em>AC3Filter & Codec</em>, <em>Radium MP3 Codec </em>itd. Postoji mnogo kodeka,
ali su verzije MPEG-a posebno popularne za audio zapise. </span></div>
<div class="MsoNormal" style="line-height: normal">
<span style="font-size: 12pt; font-family: 'Trebuchet MS','sans-serif'">Svaki
tip računarske platforme i operativnog sistema koristi svoj jedinstven format audio
zapisa za reprodukciju i snimanje. Neki od najpoznatijih audio formata koji se koriste
na webu su: Wav, AU, Real audio (RA), MP3 (MPEG audio), Quick time, liquid
audio.<br />Za zapisivanje i cuvanje `audiododataka koristite komprimovani i nekomprimovani.Komprimovani Formati se dela na formate sa gubitkom i bez gubitka kvaliteta. nekomprimovani formnati zauzimaju dosta memorijskog prostora. Komprimovani formati: mp3,wma<br />nekomprimovani<br />wav<br />au<br />aff<br /> </span></div><table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" height="6" style="border-collapse: collapse" width="4"><tbody><tr><td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206"> </td><td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206"> </td><td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
</tr>
<tr>
<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
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<td style="border: 1pt inset; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
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<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
<td style="border-width: medium 1pt 1pt medium; border-style: none inset inset none; border-color: -moz-use-text-color; padding: 0in; width: 123.6pt" valign="top" width="206"> </td>
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http://14odbojka.blog.rs/blog/14odbojka/generalna/2014/10/17/zvuk
, 17 2014 17:23:08 +0200
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Čestitamo
Ukoliko možete da pročitate ovaj članak, uspešno ste se registrovali na Blog.rs i možete početi sa blogovanjem.
http://14odbojka.blog.rs/blog/14odbojka/generalna/2014/10/03/cestitamo2
, 03 2014 17:13:44 +0200