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  1. MehdiZerrad

    Speaker perforations

    Thank you rob768 for your answer. Actually it's clear that people use this grille for the protection of the loudspeaker, but what i want to understand is the impact of this feature on the sound pressure level, among large band frequencies. Otherwise, i'm planning to pick up some measures in...
  2. MehdiZerrad

    Speaker perforations

    Thank's Greg for your help its really nice of you.
  3. MehdiZerrad

    Speaker perforations

    Thank you for your reactivity, This link contains some pictures of what i am talking about : https://www.google.fr/search?q=grille+haut+parleur+voiture&hl=fr&gbv=2&prmd=ivns&source=lnms&tbm=isch&sa=X&ei=b_J-U7TyF-ic0AWy8IGQCw&ved=0CAUQ_AU Cheers
  4. MehdiZerrad

    Speaker perforations

    Hello everybody, Is there someone who has a physical explanation about the impact of the perforations in the speakers plate, on the sound pression field ?? What is te correlation between the density of perforations and wave lenght ? Thank you
  5. MehdiZerrad

    Acoustic absorption of composite, polymer materials (in engine compartment)

    Hello everybody, I'm working on the caracterisation of the acoustic absorption of polymer and composite pipes (around the engine compartment for exemple) and i'm looking for literature treating that kind of questions. I hope you can help me. Thank you
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