|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||60/226.1 ; 181/213 ; 181/286 ; 181/292|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 24 인용 특허 : 27|
A middle layer (22) having partitioned cavities (28) is sandwiched between an imperforate sheet (24) and an optional perforate sheet (26) to form a low resistance acoustic liner (22). A preferred method of manufacture of the low resistance acoustic liner (20) uses aspects of the buried septum technique including placing an uncured imperforate septum (36) between a support layer (32) and a partitioned cavity middle layer (22), pressing the middle layer into the imperforate sheet (24) and through the support layer (32), curing the imperforate septum 36 to ...
[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] An acoustic lining for use in attenuating noise in and around the surfaces of a jet engine, comprising:(a) a low resistance acoustic liner having a resistance coefficient in the range of about 0 to 0.5 pc, the low resistance acoustic liner comprising:(i) a middle layer having a multiplicity of partitioned cavities and top and bottom sides;(ii) a perforated sheet attached to the top side of the middle layer; and(iii) an imperforate sheet...