|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||181/214 ; 181/222 ; 181/286 ; 181/292|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 79 인용 특허 : 4|
Combination bulk absorber-honeycomb acoustic panels particularly adapted for use in the inlet and fan air duct of a fan jet engine are disclosed. Each panel comprises a broadband noise-suppressing bulk absorber layer mounted between a back sheet and a perforated septum; and, a narrow band noise-suppressing honeycomb layer mounted between the septum and a perforated face sheet. The panels are mounted in an engine such that the perforated face sheet interfaces with airflow in the inlet or the fan air duct, as the case may be, whereby the face sheet, honeyc...
A combination bulk absorber-honeycomb acoustic panel comprising: an impervious back sheet; a perforated septum sheet; a broadband noise-suppressing bulk absorber layer mounted between said back sheet and said septum sheet; a perforated face sheet; and a rigid noise-suppressing honeycomb layer mounted between said septum sheet and said face sheet.