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71. 发明申请

WO1986006916A1 MICROPHONE WITH NON-SYMMETRICAL DIRECTIVITY PATTERN 审中-公开
标题翻译：具有非对称方向图的麦克风
公开(公告)号：WO1986006916A1
公开(公告)日：1986-11-20
申请号：PCT/US1986000410
申请日：1986-02-25
申请人： ELECTROVOICE, INC.
发明人： ELECTROVOICE, INC. , WATSON, Alan, R. , BRYSON, Michael, A.
IPC分类号： H04R01/02
CPC分类号： H04R1/08 , H04R1/38
摘要： A microphone (10) has unique polar response characteristics and improves the problem of off-axis symmetry of cardioid and cardioid family microphones when the sound source can be accurately placed on a particular side of the microphone. The microphone (10) has a virtual axis of a maximum pickup sensitivity which is angularly displaced from the physical longitudinal axis. The microphone (10) has a diaphragm (65) which has a front side and a rear side. Forward and rearward movement of the diaphragm (65) is sensed by a sensing element (61) mounted in spaced relationship to the rear side of the diaphragm (65). A cavity (80) is formed between the diaphragm (65) and the sensing element (61). The cavity (80) is substantially enclosed, with a non-symmetrical arrangement of at least one aperture (63) for permitting sound pressure waves to enter the substantially enclosed cavity (80), so that the polar response curve of the microphone (10) in a horizontal plane is angularly displaced about a line perpendicular to the microphone's horizontal longitudinal axis.

72. 发明申请

WO1984001681A1 LOUDSPEAKER 审中-公开
标题翻译：喇叭
公开(公告)号：WO1984001681A1
公开(公告)日：1984-04-26
申请号：PCT/FI1983000065
申请日：1983-10-17
申请人： POLARPRO OY , SAASTAMOINEN, Pekka , LESKINEN, Kimmo
发明人： POLARPRO OY
IPC分类号： H04R01/02
CPC分类号： H04R1/347 , H04R1/288
摘要： A loudspeaker which comprises a loudspeaker element (1) and a box (2), the loudspeaker element being installed on one wall (3) of the said box. The objective is to provide good directivity of low frequencies without the drawbacks of a dipole radiator. At least one wall of the loudspeaker box, e.g. the rear wall (4) or both side walls, is designed such that it allows the passage of the background radiation (9) of the loudspeaker element into the listening space as attenuated and as of opposite phase, compared with the frontal radiation of the loudspeaker element (1).
摘要翻译：一种扬声器，包括扬声器元件（1）和盒（2），所述扬声器元件安装在所述盒的一个壁（3）上。目的是提供低频的良好方向性，而没有偶极辐射器的缺点。扬声器箱的至少一个壁，例如后壁（4）或两个侧壁被设计成使得其与扬声器的正面辐射相比允许扬声器元件的背景辐射（9）通过衰减和相反相位的收听空间元件（1）。

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