Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
BARRIERE ACOUSTIQUE AJOUREE PERMETTANT UN TRAITEMENT HYBRIDE PASSIF/ACTIF DU BRUIT
The invention relates to a method and a device for passive and active acoustic reduction, including m electro-acoustic bars (41) side by side and separated by gaps (D), thus constituting an open-work acoustic barrier combining passive and active noise-reduction. Each electro-acoustic bar (41) includes a plurality of acoustic reduction elements (70) arranged, side by side, each acoustic reduction element (70) including a microphone (62) and a loudspeaker (61) disposed inside a box (60) made of a passive acoustically absorbent material or including a passive acoustically absorbent material, the microphone (62) and the loudspeaker (61) being connected to control electronics (73) capable of receiving a measurement of the transfer function between the microphone (62) and the loudspeaker (61) and of computing a feedback control electronic filter for each acoustic reduction element (70) from the transfer function between the microphone (62) and the loudspeaker (61), and acting, within each acoustic reduction element (70), to enable the loudspeaker (61) to be electro-acoustically looped to the microphone (62) by amplifying the feedback in order to obtain real-time acoustic absorption for a predetermined, range of frequencies.
BARRIERE ACOUSTIQUE AJOUREE PERMETTANT UN TRAITEMENT HYBRIDE PASSIF/ACTIF DU BRUIT
The invention relates to a method and a device for passive and active acoustic reduction, including m electro-acoustic bars (41) side by side and separated by gaps (D), thus constituting an open-work acoustic barrier combining passive and active noise-reduction. Each electro-acoustic bar (41) includes a plurality of acoustic reduction elements (70) arranged, side by side, each acoustic reduction element (70) including a microphone (62) and a loudspeaker (61) disposed inside a box (60) made of a passive acoustically absorbent material or including a passive acoustically absorbent material, the microphone (62) and the loudspeaker (61) being connected to control electronics (73) capable of receiving a measurement of the transfer function between the microphone (62) and the loudspeaker (61) and of computing a feedback control electronic filter for each acoustic reduction element (70) from the transfer function between the microphone (62) and the loudspeaker (61), and acting, within each acoustic reduction element (70), to enable the loudspeaker (61) to be electro-acoustically looped to the microphone (62) by amplifying the feedback in order to obtain real-time acoustic absorption for a predetermined, range of frequencies.
BARRIERE ACOUSTIQUE AJOUREE PERMETTANT UN TRAITEMENT HYBRIDE PASSIF/ACTIF DU BRUIT
CARME CHRISTIAN (Autor:in)
25.09.2015
Patent
Elektronische Ressource
Französisch
IPC:
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
,
Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl.
/
G10K
Tonerzeugungsvorrichtungen
,
SOUND-PRODUCING DEVICES
Contre bruit : le controle acoustique actif sort du laboratoire
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Systeme de contre-bruit passif pour ameliorer la performance des ecrans acoustique en milieu urbain
| British Library Conference Proceedings | 1992
Le bouchon vaseux estuarien: filtre actif ou passif
| British Library Online Contents | 2001
Le bruit, les vitrages et l'isolation acoustique
| Tema Archiv | 1994