Device for actively reducing sound transmission, and panel comprising such device
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01N-001/06
F01N-001/20
F01N-001/16
F01N-001/02
G10K-011/16
G10K-011/00
출원번호
UP-0545138
(2004-02-11)
등록번호
US-7530426
(2009-07-01)
우선권정보
NL-1022647(2003-02-11)
국제출원번호
PCT/NL04/000102
(2004-02-11)
§371/§102 date
20050810
(20050810)
국제공개번호
WO04/072945
(2004-08-26)
발명자
/ 주소
Berkhoff, Arthur Perry
출원인 / 주소
Nederlandse Organisatie voor toegepast natuurwetenschappelijk Onderzoek TNO
대리인 / 주소
Hoffmann & Baron, LLP
인용정보
피인용 횟수 :
1인용 특허 :
9
초록▼
A device for actively reducing sound transmission, provided with a first and second wall (3, 5) enclosing an inner space (1, 2), wherein at least the second wall (5) is provided with actuators (6), for instance eletromagnetic actuators and/or piezoeleteric elements, wherein the said inner space is p
A device for actively reducing sound transmission, provided with a first and second wall (3, 5) enclosing an inner space (1, 2), wherein at least the second wall (5) is provided with actuators (6), for instance eletromagnetic actuators and/or piezoeleteric elements, wherein the said inner space is provided with at least one inner wall (4) to divide this space into at least two layers of air (1, 2), which inner wall (4) is arranged such that the layers of air (1, 2) are in fluid connection with each other.
대표청구항▼
The invention claimed is: 1. A device for actively reducing sound transmission, provided with a first and a second wall (3, 5) enclosing an inner space (1, 2), wherein at least the second wall (5) is provided with actuators (6), wherein the actuators (6) are at least one of electromagnetic and piez
The invention claimed is: 1. A device for actively reducing sound transmission, provided with a first and a second wall (3, 5) enclosing an inner space (1, 2), wherein at least the second wall (5) is provided with actuators (6), wherein the actuators (6) are at least one of electromagnetic and piezoelectric elements, wherein the inner space is provided with at least one inner wall (4) to divide this space into at least two layers of air (1, 2), wherein the inner wall (4) includes a plurality of apertures passing therethrough, thereby providing direct fluid communication between the at least two layers of air (1, 2). 2. A device according to claim 1, wherein the at least first layer of air (1) has a thickness (M) which is larger than the thickness (N) of the at least second layer of air (2). 3. A device according to claim 1, wherein the second wall (5) extends along the second layer of air (2). 4. A device according to claim 1, wherein the actuators (6) are provided on an inside of the second wall (5). 5. A device according to claim 1, wherein the first wall (3) is connected to the inner wall (4) by substantially stiff connecting means (8). 6. A device according to claim 5, wherein the said substantially stiff connecting means are provided with stiffening walls (8) extending between this first wall (3) and inner wall (4). 7. A device according to claim 5, wherein the said connecting means comprise a sandwich structure. 8. A device according to claim 1, wherein the second wall (5) is connected to the inner wall (4) by flexible connecting means (9), wherein the flexible connecting means (9) includes at least one of a spring means and elastic material. 9. A device according to claim 1, wherein the second wall (5) is set up at such a distance from the inner wall (4) that this second wall (5) and the actuators (6) can carry out the movements desired for the sound reduction substantially without being hindered by the opposite inner wall (4). 10. A device according to claim 1, wherein the thickness (M) of the at least first layer of air is larger than approximately 1 mm. 11. A device according to claim 1, wherein the thickness (N) of the at least second layer of air is in the range of approximately 0.5-50 mm. 12. A device according to claim 1, wherein the inner wall (4) comprises a perforated wall. 13. A device according to claim 1, wherein at least one of the first and second wall (3, 5) has a substantially solid design. 14. A device according to claim 1, wherein the first wall (3), second wall (5) and the inner wall (4) are substantially parallel. 15. A device according to claim 1, wherein the device is provided with sensors (7), wherein the sensors (7) are at least one of vibration, strain, acceleration and sound sensors. 16. A device according to claim 15, wherein the said actuators (6) and sensors (7) are disposed at least in or near the same layer of air (2). 17. A device according to claim 15, wherein the device is provided with sound sensors disposed on a side of the second wall (5) facing away from the said inner space (1, 2). 18. A device according to claim 1, wherein at least the second wall comprises a lightweight plate. 19. A panel, comprising a device for actively reducing sound transmission, provided with a first wall and a second wall enclosing an inner space, wherein at least the second wall is provided with actuators, the actuators having at least one of electromagnetic and piezoelectric elements, wherein the inner space is provided with at least one inner wall dividing the inner space into at least two layers of air, wherein the inner wall includes a plurality of apertures passing therethrough, the apertures providing direct fluid communication between the at least two layers of air. 20. A device according to claim 1, wherein the first wall and the second wall are solid walls, configured to fluid-tightly close off the inner space, at least on longitudinal sides, from an environment.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (9)
Pla Frederic G. (Clifton Park NY) Rajiyah Harindra (Clifton Park NY), Active noise control of aircraft engine discrete tonal noise.
Pla Frederic G. (Schenectady NY) Rajiyah Harindra (Clifton Park NY) Renshaw Anthony A. (Albany NY) Hedeen Robert A. (Clifton Park NY), Active noise control using noise source having adaptive resonant frequency tuning through stiffness variation.
Pla Frederic G. (Schenectady NY) Rajiyah Harindra (Clifton Park NY) Renshaw Anthony A. (Albany NY) Hedeen Robert A. (Clifton Park NY), Active noise control using noise source having adaptive resonant frequency tuning through stress variation.
Pla Frederic G. (Schenectady NY) Rajiyah Harindra (Clifton Park NY) Renshaw Anthony A. (Albany NY) Hedeen Robert A. (Clifton Park NY), Active noise control using noise source having adaptive resonant frequency tuning through variable ring loading.
Jones, Kennie H; Nark, Douglas M.; Jones, Michael G.; Parrott, Tony L.; Lodding, Kenneth N., Method of adjusting acoustic impedances for impedance-tunable acoustic segments.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.