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公开(公告)号：US07224814B2
公开(公告)日：2007-05-29
申请号：US10476715
申请日：2002-05-01
CPC分类号： H04R1/00
摘要： A two-way communication device includes a magnetoelastic rod located between an inertial back mass and a front panel of low mass. A coil is located in the vicinity of the rod, and the rod and coil together define an audio-electric transducer. An electronic processing circuit ensures that an audio-electric signal input to the device is applied to the coil to produce a sound wave from the low mass front panel and that when a sound wave impinges on the low mass front panel an audio-electric signal is produced and output from the device.
摘要翻译： 双向通信装置包括位于惯性背质与低质量前面板之间的磁致弹性杆。 线圈位于杆的附近，杆和线圈一起限定音频电传感器。 电子处理电路确保输入到装置的音频电信号被施加到线圈以从低质量前面板产生声波，并且当声波撞击低质量前面板时，音频电信号是 从设备产生和输出。
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公开(公告)号：US07971485B2
公开(公告)日：2011-07-05
申请号：US12309826
申请日：2007-07-30
IPC分类号： G01N29/12
CPC分类号： G01N29/11 , G01N29/2412 , G01N29/4427 , G01N29/46 , G01N33/46 , G01N2291/02466 , G01N2291/0421 , G01N2291/0422 , G01N2291/048 , G01N2291/102
摘要： A method of testing an elongate wooden element includes injecting an input acoustic signal into the element, detecting a return acoustic signal at a surface of the element, and determining a spectral profile for the return signal. In at least a predetermined range in the spectral profile, each resonance peak is detected whose amplitude exceeds a first predetermined value, and from the resonance peaks so detected the number of higher peaks is determined whose amplitude exceeds 3 dB. For each of said higher peaks a quality factor Q is calculated, a mean quality value Qm is determined, and Qm is then compared with a predetermined value to provide an indication of the presence or absence of external decay of the element. A ratio R of the number of higher peaks to the number of resonance peaks detected, and the statistical spread S of the average Q for the spectral profile, are calculated and compared with a predetermined boundary function Fn(R,S) to determine acceptability or unacceptability of the pole.
摘要翻译： 测试细长木质元件的方法包括将输入的声学信号注入到元件中，检测元件表面处的返回声学信号，以及确定返回信号的光谱分布。 在光谱轮廓中的至少一个预定范围内，检测振幅超过第一预定值的每个共振峰，并且从所检测到的共振峰确定振幅超过3dB的较高峰值数。 对于每个所述较高峰，计算品质因子Q，确定平均质量值Qm，然后将Qm与预定值进行比较，以提供元素的外部衰减的存在或不存在的指示。 计算出较高峰数与检测到的共振峰数的比R以及频谱分布的平均值的统计扩展S，并与预定的边界函数Fn（R，S）进行比较，以确定可接受性或 极点不能接受。
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公开(公告)号：US20090188320A1
公开(公告)日：2009-07-30
申请号：US12309826
申请日：2007-07-30
IPC分类号： G01N29/44
CPC分类号： G01N29/11 , G01N29/2412 , G01N29/4427 , G01N29/46 , G01N33/46 , G01N2291/02466 , G01N2291/0421 , G01N2291/0422 , G01N2291/048 , G01N2291/102
摘要： A method of testing an elongate wooden element comprises injecting an input acoustic signal into the element, detecting a return acoustic signal at a surface of the element, and determining a spectral profile for the return signal. In at least a predetermined range in the spectral profile, each resonance peak is detected whose amplitude exceeds a first predetermined value, and from the resonance peaks so detected the number of higher peaks is determined whose amplitude exceeds 3 dB. For each of said higher peaks a quality factor Q is calculated, a mean quality value Qm is determined, and Qm is then compared with a predetermined value to provide an indication of the presence or absence of external decay of the element. A ratio R of the number of higher peaks to the number of resonance peaks detected, and the statistical spread S of the average Q for the spectral profile, are calculated and compared with a predetermined boundary function Fn(R,S) to determine acceptability or unacceptability of the pole.
摘要翻译： 测试细长木质元件的方法包括将输入的声学信号注入到元件中，检测元件表面处的返回声学信号，以及确定返回信号的光谱分布。 在光谱轮廓中的至少一个预定范围内，检测振幅超过第一预定值的每个共振峰，并且从所检测到的共振峰确定振幅超过3dB的较高峰值数。 对于每个所述较高峰，计算品质因子Q，确定平均质量值Qm，然后将Qm与预定值进行比较，以提供元素的外部衰减的存在或不存在的指示。 计算出较高峰数与检测到的共振峰数的比R以及频谱分布的平均值的统计扩展S，并与预定的边界函数Fn（R，S）进行比较，以确定可接受性或 极点不能接受。
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