-
公开(公告)号：US20100254558A1
公开(公告)日：2010-10-07
申请号：US12727788
申请日：2010-03-19
IPC分类号： H04R1/20
摘要： A loudspeaker is provided that passively achieves a directional polar response at low frequencies with a high degree of attenuation between the front and the back of the loudspeaker. The loudspeaker 11 has a transducer 13, an enclosure 21 behind the transducer, and port openings 29 in the sidewalls 23 of the enclosure to allow a back-wave produced by the transducer to exit the enclosure and combine with the front wave produced by the transducer. Cancellation behind the loudspeaker at low frequencies is achieved by delaying the back wave with low loss. Low loss delay at low frequencies is achieved by inserting a low-density fibrous fill material 33 in the acoustic chamber 27 formed behind the transducer 13 by the enclosure 21. A fibrous material is selected having a low-pass transfer function and low acoustic loss in its low-frequency pass band.
摘要翻译： 提供了一种扬声器，其被动地在低频处实现定向极性响应，并且在扬声器的前后之间具有高度衰减。 扬声器11具有换能器13，换能器后面的外壳21和外壳侧壁23中的端口29，以允许由换能器产生的反向波从外壳排出并与由换能器产生的前波相结合 。 扬声器背后的低频消除是通过以低损耗延迟后波来实现的。 通过将低密度纤维填充材料33插入到通过外壳21形成在换能器13后面的声学室27中来实现低频下的低损耗延迟。选择具有低通传递函数和低声损失的纤维材料 其低频通带。
-
公开(公告)号：US08428284B2
公开(公告)日：2013-04-23
申请号：US12727788
申请日：2010-03-19
IPC分类号： H04R1/20
摘要： A loudspeaker is provided that passively achieves a directional polar response at low frequencies with a high degree of attenuation between the front and the back of the loudspeaker. The loudspeaker 11 has a transducer 13, an enclosure 21 behind the transducer, and port openings 29 in the sidewalls 23 of the enclosure to allow a back-wave produced by the transducer to exit the enclosure and combine with the front wave produced by the transducer. Cancellation behind the loudspeaker at low frequencies is achieved by delaying the back wave with low loss. Low loss delay at low frequencies is achieved by inserting a low-density fibrous fill material 33 in the acoustic chamber 27 formed behind the transducer 13 by the enclosure 21. A fibrous material is selected having a low-pass transfer function and low acoustic loss in its low-frequency pass band.
摘要翻译： 提供了一种扬声器，其被动地在低频处实现定向极性响应，并且在扬声器的前后之间具有高度衰减。 扬声器11具有换能器13，换能器后面的外壳21和外壳侧壁23中的端口29，以允许由换能器产生的反向波从外壳排出并与由换能器产生的前波相结合 。 扬声器背后的低频消除是通过以低损耗延迟后波来实现的。 通过将低密度纤维填充材料33插入到通过外壳21形成在换能器13后面的声学室27中来实现低频下的低损耗延迟。选择具有低通传递函数和低声损失的纤维材料 其低频通带。
-
公开(公告)号：US08148992B2
公开(公告)日：2012-04-03
申请号：US12119976
申请日：2008-05-13
申请人： Peter Kowalczyk , Cliff Candy
发明人： Peter Kowalczyk , Cliff Candy
IPC分类号： G01V3/00
CPC分类号： G01V3/104 , Y02A90/342
摘要： The present invention, in various embodiments, is directed to a geophysical system and method in which a transmitter coil is oriented with its axis horizontally, and a sensor is positioned below the coil to measure an ambient electrical and/or magnetic parameter associated with a conductive medium surrounding the at least one transmitter coil.
摘要翻译： 在各种实施例中，本发明涉及一种地球物理系统和方法，其中发射器线圈以其轴线水平定向，并且传感器位于线圈下方以测量与导电性相关联的环境电和/或磁参数 介质围绕至少一个发射器线圈。
-
公开(公告)号：US20080284441A1
公开(公告)日：2008-11-20
申请号：US12119976
申请日：2008-05-13
申请人： Peter Kowalczyk , Cliff Candy , Joel Jansen
发明人： Peter Kowalczyk , Cliff Candy , Joel Jansen
CPC分类号： G01V3/104 , Y02A90/342
摘要： The present invention, in various embodiments, is directed to a geophysical system and method in which a transmitter coil is oriented with its axis horizontally, and a sensor is positioned below the coil to measure an ambient electrical and/or magnetic parameter associated with a conductive medium surrounding the at least one transmitter coil.
摘要翻译： 在各种实施例中，本发明涉及一种地球物理系统和方法，其中发射器线圈以其轴线水平定向，并且传感器位于线圈下方以测量与导电性相关联的环境电和/或磁参数 介质围绕至少一个发射器线圈。
-
公开(公告)号：US20060016621A1
公开(公告)日：2006-01-26
申请号：US11149422
申请日：2005-06-08
申请人： Eric Jackson , Peter Kowalczyk
发明人： Eric Jackson , Peter Kowalczyk
IPC分类号： E21B15/02
摘要： The present invention is directed to an underwater drilling system that includes a shuttle for transporting drill rods, geophysical tools, and/or core barrels from the underwater drilling platform to a surface vessel and/or a robotic vehicle to provide power to the underwater drilling platform and monitor and/or control the operation of the underwater drilling platform.
摘要翻译： 本发明涉及一种水下钻井系统，其包括用于将钻杆，地球物理工具和/或核心筒从水下钻井平台输送到地面船和/或机器人车辆的梭子，以向水下钻井平台 并监测和/或控制水下钻井平台的运行。
-
-
-
-
搜索结果
5 条记录 (耗时 0.011 秒)