Improved thermal-acoustic sections for aircraft

Improved thermal-acoustic sections for aircraft

  • CN 104,285,021 A
  • Filed: 12/06/2012
  • Published: 01/14/2015
  • Est. Priority Date: 12/08/2011
  • Status: Active Application
First Claim
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1. the hot part for the noise reducing to produce from sound source along acoustic path being suitable for aircraft divides, and described hot part divides and comprises:

  • There is the first porous layer of the first Characteristic impedance;

    AndSecond porous layer, its contiguous described first porous layer arranges and has the second Characteristic impedance being greater than described first Characteristic impedance, wherein said hot part divides and is configured to locate along described acoustic path, makes described first porous layer that is conducted through at least partially of described noise arrive described second porous layer to promote noise absorbent.

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