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Matériaux poreux acoustiques - SFA

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Introduction Applications R&D Applications Bâtiments Applications Industrielles Discussion<br />

Traitement de 2 parois (2/2)<br />

Simple porosité<br />

Double porosité<br />

Radiated power (dB ref 1e−12 W)<br />

120<br />

115<br />

110<br />

105<br />

100<br />

95<br />

90<br />

85<br />

80<br />

No treatment<br />

side & top<br />

side & side<br />

side & front<br />

Radiated power (dB ref 1e−12 W)<br />

120<br />

115<br />

110<br />

105<br />

100<br />

95<br />

90<br />

85<br />

80<br />

No treatment<br />

side & top<br />

side & side<br />

side & front<br />

75<br />

75<br />

70<br />

0 100 200 300 400 500<br />

Frequency (Hz)<br />

70<br />

0 100 200 300 400 500<br />

Frequency (Hz)<br />

! réduction supérieure avec double porosité pour toutes les combinaisons<br />

F.-X. Bécot – fxb@matelys.com – http://www.matelys.com Journées d’étude Poreux, 14-15 Mai 2009 : 34

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