公开(公告)号：BR8102602A

公开(公告)日：1982-01-19

申请号：BR8102602

申请日：1981-04-28

Applicant: MOTOROLA INC

Inventor： BAITCHER N

IPC: H04R7/22 ,  H04R7/20 ,  H04R7/26 ,  H04R17/00

Abstract: The periphery of the diaphragm of a loudspeaker is mechanically connected to a diaphragm support or basket by a layer of acoustic dampening-adhesive material. The layer of acoustic dampening-adhesive material covers a sufficient portion of the surfaces of the diaphragm to dampen standing waves which would otherwise reflect from the periphery of the diaphragm. Thus, a unitary diaphragm mechanical termination-acoustic termination structure is formed.

公开(公告)号：WO1982000543A1

公开(公告)日：1982-02-18

申请号：PCT/US1981000888

申请日：1981-06-29

Applicant: MOTOROLA INC

Inventor： MOTOROLA INC ,  BAITCHER N

IPC: H01L41/04

CPC classification number: H04R1/2819 ,  G05B2219/34447 ,  H04R1/225 ,  H04R17/00

Abstract: As shown in Fig. 2A the back surface (110B) of the diaphragm (110) of a loudspeaker (100) exhibiting relatively small excursions at midrange frequencies is substantially surrounded by a housing (140) including an acoustic filter (150, 152) therein for attenuating high frequency components of the acoustic signal radiating from the back surface (110B) of the diaphragm (110). The remaining midrange components of the acoustic signal radiating from the back surface (110B) of the diaphragm (110) are phase-delayed and redirected through at least one port (145) in the housing (140) such that the remaining midrange components of the acoustic signal radiating from the back surface (110B) of the diaphragm (110) join the midrange components of the acoustic signal radiating from the front surface (110A) of the diaphragm (110) substantially in phase therewith. The response of the loudspeaker (100) to midrange signals is thus enhanced.

Abstract translation: 如图所示。 如图2A所示，在中频范围内呈现相对较小偏移的扬声器（100）的隔膜（110）的后表面（110B）基本上由包括其中的声滤波器（150,152）的壳体（140）包围，用于衰减高频分量 的声学信号从隔膜（110）的后表面（110B）辐射。 从隔膜（110）的后表面（110B）辐射的声信号的剩余中间分量被相位延迟并且通过壳体（140）中的至少一个端口（145）重定向，使得剩余的中间部分 从隔膜（110）的后表面（110B）辐射的声信号基本上与隔膜（110）的前表面（110A）的前表面（110A）辐射的中频分量连接在一起。 因此扬声器（100）对中频信号的响应得到增强。