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         <title>TP4: L&#39;analyse d&#39;un son; Le son &quot;La&quot;</title>
         <author>gabrielle_charles</author>
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         <description><![CDATA[<div><em>Problème posé </em>: "Trois instruments jouent la même note. Pourquoi le ressenti à l'oreille n'est-il pas le même<br><br>Après enregistrement, voici les spectres des différents instruments.<br><br></div>]]></description>
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         <description><![CDATA[<div><strong>Fondamental</strong>: 453Hz<br><strong>Harmoniques</strong>:<br>- rang 2: 896Hz<br>- rang 3: 1333Hz</div>]]></description>
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         <title>Méthode du traitement du son</title>
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         <description><![CDATA[<div>Pour obtenir les trois courbes violettes il faut:<br>- Aller dans audacity<br>- Dans "analyse" choisir "tracer le spectre"<br>- Choisir "fréquence logarithmique"<br>- Repérer alors les différentes fréquences des sinusoïdes composant le signal.</div>]]></description>
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