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<p><b>Audio signal processing</b> is a subfield of <a href="page.php?w=signal_processing">signal processing</a> that is concerned with the electronic manipulation of <a href="page.php?w=audio_signal">audio signal</a>s. Audio signals are electronic representations of <a href="page.php?w=sound_wave">sound wave</a>s--<a href="page.php?w=longitudinal_wave">longitudinal wave</a>s which travel through air, consisting of compressions and rarefactions. The energy contained in audio signals or <a href="page.php?w=sound_power_level">sound power level</a> is</p><p>
<a accesskey="3" href="page.php?w=audio_signal_processing&amp;p=2">3.Next</a>
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