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<p>is used on voice to reduce sibilance and in <a href="page.php?w=broadcasting">broadcasting</a> and <a href="page.php?w=advertising">advertising</a> to make an audio program stand out. It is an integral technology in some <a href="page.php?w=noise_reduction">noise reduction</a> systems.</p>

<p><big> Types </big></p>
<p>There are two types of compression: downward and upward. Both types of compression reduce the <a href="page.php?w=Dynamic_range">dynamic range</a> of an audio signal.</p>

<p>Downward compression reduces the volume of loud sounds above a</p><p>
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