(19)
(11) EP 2 458 090 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.03.2014 Bulletin 2014/13

(43) Date of publication A2:
30.05.2012 Bulletin 2012/22

(21) Application number: 11190856.2

(22) Date of filing: 25.11.2011
(51) International Patent Classification (IPC): 
E01F 8/00(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 25.11.2010 IT TV20100150

(71) Applicant: Fracasso S.p.A.
30032 Fiesso d'Artico (VE) (IT)

(72) Inventors:
  • Bettarello, federica
    45100 ROVIGO (IT)
  • Caniato, Marco
    31015 CONEGLIANO (IT)
  • Pasqualin Stefano
    31020 SAN POLO DI PIAVE (IT)
  • Sartor, Leo
    31044 MONTEBELLUNA (IT)

(74) Representative: Bergadano, Mirko et al
Studio Torta S.p.A. Via Viotti, 9
10121 Torino
10121 Torino (IT)

   


(54) Acoustic panel for noise barriers and noise barrier provided with such a panel


(57) An acoustic panel (1) characterized by comprising: a reverberating plate (6) having, on one of the two faces, a stepped-profile surface (6a) which is dimensioned so as to reflect in a "diffused" manner at least one incident acoustic wave with a predetermined reference frequency; and a layer of sound-absorbent material (7) which is coupled to the reverberating plate (6) so as to cover the stepped-profile surface (6a), and so as to be crossed in "diffused" manner by the acoustic wave reflected by said stepped-profile surface (6a); the profile of the stepped-profile surface (6a) being determined on the basis of the "Quadratic Residue" mathematical model.







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