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5) La résonance acoustique<br />
• Notion <strong>de</strong> phase<br />
– On<strong>de</strong>s en phase (360°<strong>de</strong> déphasage) : pics<br />
<strong>de</strong> pression coïnci<strong>de</strong>nt (l’amplitu<strong>de</strong> <strong>de</strong> l’on<strong>de</strong><br />
résultante est doublée).<br />
+<br />
=
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