EP 3384487 A1 20181010 - ABSORBENT ACOUSTIC METAMATERIAL
Title (en)
ABSORBENT ACOUSTIC METAMATERIAL
Title (de)
ABSORBIERENDES AKUSTISCHES METAMATERIAL
Title (fr)
MÉTAMATÉRIAU ACOUSTIQUE ABSORBANT
Publication
Application
Priority
- FR 1561744 A 20151202
- FR 2016053190 W 20161202
Abstract (en)
[origin: WO2017093693A1] The invention relates to an elementary acoustic metamaterial cell (1) comprising: a body (2) made of solid material; and at least one resonator taking the form of a groove (3) of width l and depth p, said groove (3) being open on the surface of said body, wherein: the depth p is set by a resonant frequency (f) of the cell according to a relationship x, c being the speed of sound in air; and the width l is set by an energy density confined in said cell according to a logarithmic relationship E max α log (l) determined experimentally, said groove having an acoustic absorption controlled by a ratio between the depth p and the width l of the groove. The invention also relates to an acoustic screen comprising such an elementary cell.
IPC 8 full level
G10K 11/04 (2006.01); G10K 11/168 (2006.01); G10K 11/172 (2006.01)
CPC (source: EP US)
G10K 11/04 (2013.01 - EP US); G10K 11/168 (2013.01 - EP US); G10K 11/172 (2013.01 - EP US)
Citation (search report)
See references of WO 2017093693A1
Designated contracting state (EPC)
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 state (EPC)
BA ME
DOCDB simple family (publication)
WO 2017093693 A1 20170608; EP 3384487 A1 20181010; EP 3384487 B1 20230419; FR 3044812 A1 20170609; FR 3044812 B1 20181102; JP 2018536201 A 20181206; JP 6822643 B2 20210127; US 11081095 B2 20210803; US 2018357994 A1 20181213
DOCDB simple family (application)
FR 2016053190 W 20161202; EP 16819595 A 20161202; FR 1561744 A 20151202; JP 2018528797 A 20161202; US 201615781394 A 20161202