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    • 76. 发明申请
    • LOUDSPEAKER
    • 喇叭
    • WO02063604A2
    • 2002-08-15
    • PCT/GB0200483
    • 2002-02-04
    • QINETIQ LTDHERON KENNETH HARRYNASH MALCOLMPAYNE ANDREW PHILIP
    • HERON KENNETH HARRYNASH MALCOLMPAYNE ANDREW PHILIP
    • H04R1/00H04R7/04G10K11/00
    • H04R7/045H04R3/12
    • Conventional analogue loudspeakers have a limited dynamic range as compared to the available dynamic range of digital recordings. Digital recordings use up to 24 bits and this implies a dynamic range of 141dB. Digital loudspeakers, involving 2 single bit device (with N = 24, this number is 1.7x10 ) have been proposed. Complexity and poor performance associated with the interaction effects between the different devices have discouraged widespread use of such systems, along with the inability of most loudspeakers to reproduce realistic absolute levels of sound (up to say 120dB at 1m without distortion), so such digital loudspeakers cannot take full advantage of the 24-bit fidelity. This invention provides a loudspeaker with improved dynamic range over prior art systems.
    • 传统的模拟扬声器与数字录音的可用动态范围相比具有有限的动态范围。 数字录音最多可使用24位,这意味着141dB的动态范围。 数字扬声器涉及2 N单位设备(N = 24,这个数字是1.7×10 7)。 与不同设备之间的相互作用影响相关的复杂性和差的性能阻止了这种系统的广泛使用,以及大多数扬声器无法再现真实的绝对水平的声音(在1m时达到120dB而没有失真),因此这样的数字扬声器 无法充分利用24位保真度。 本发明提供了一种具有比现有技术系统更好的动态范围的扬声器。
    • 78. 发明申请
    • BRACELET FOR MOVING ULTRASONIC SENSORS ALONG A PIPE
    • 用于移动超声波传感器的手套
    • WO0196808A3
    • 2002-05-02
    • PCT/CA0100842
    • 2001-06-08
    • HYDRO QUEBEC
    • LAVOIE ERIC
    • G01B17/02G01N29/22G01N29/28G10K11/00G21C17/017B06B1/06G01N29/26
    • G01B17/02G01N29/223G01N29/225G01N29/28G01N2291/02854G01N2291/2634G10K11/004G21C17/017G21Y2002/203G21Y2002/204G21Y2002/40G21Y2004/30G21Y2004/501
    • A bracelet (14) for moving sensors (12) along a straight or elbow pipe. The bracelet (14) has a number of side-by-side positionable supports (10) for removably holding the sensors (12) respectively. A flexible attachment, such as a string (20), is provided for holding the supports (10) in a pliant side-by-side series arrangement (22). The string (20) has opposite ends (24) extending beyond the supports (10) at opposite ends (26) of the series arrangement (22). The bracelet (14) further has a frame (28) having an inner circular opened surface (30) for installation around the pipe, and a longitudinal circular side receiving surface (32) along which the series arrangement (22) of the supports (10) is mounted. The side receiving surface (32) is provided with fastening members (34) projecting at both ends (26) of the series arrangement (22) of the supports (10). The ends (24) of the string (20) is supported by the fastening members (34).
    • 用于沿着直管或弯管移动传感器(12)的手镯(14)。 手镯(14)具有分别用于可移除地保持传感器(12)的多个并排的可定位支撑件(10)。 提供了诸如弦线(20)的柔性附件,用于将支撑件(10)保持在柔顺的并排串联装置(22)中。 弦(20)具有在串联装置(22)的相对端(26)处延伸超过支撑件(10)的相对端(24)。 手镯(14)还具有框架(28),该框架具有用于围绕管道安装的内部圆形开口表面(30)和纵向圆形侧面接收表面(32),支撑件(10)的串联装置 )。 侧接收表面(32)设置有在支撑件(10)的串联装置(22)的两端(26)处突出的紧固构件(34)。 绳(20)的端部(24)由紧固构件(34)支撑。