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1.发明授权Method and means of detecting the presence of a signal representing voice and of compressing the level of the signal 失效检测表示语音的信号的存在以及压缩信号电平的方法和装置
公开(公告)号：US4550426A
公开(公告)日：1985-10-29
申请号：US680444
申请日：1984-12-11
摘要： A circuit that combines the functions of audio compression and voice detection comprises an amplifier in a negative-feedback configuration in which the feedback signal is the product of the output of the amplifier and a syllabic voltage derived from that output. The syllabic voltage is compared with a threshold level to provide an output that is a measure of the presence of a voice signal. In an alternate embodiment, the syllabic voltage is compared with the sum of a threshold level and a detected syllabic voltage to generate a signal that is a measure of the presence of voice. The syllabic detector may be either an averaging detector or a valley detector.
摘要翻译： 组合音频压缩和语音检测功能的电路包括负反馈配置的放大器，其中反馈信号是放大器的输出和从该输出得到的音节电压的乘积。 将音节电压与阈值电平进行比较，以提供作为语音信号存在度量的输出。 在替代实施例中，将音节电压与阈值电平和检测到的音节电压的和进行比较，以产生作为语音存在的度量的信号。 音节检测器可以是平均检测器或谷值检测器。
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公开(公告)号：US4421952A
公开(公告)日：1983-12-20
申请号：US311832
申请日：1981-10-16
申请人： Michael F. Barnes
发明人： Michael F. Barnes
CPC分类号： H03K23/667
摘要： Circuitry for synthesizing a busy or reorder tone comprised of a first tone having a frequency of 770 Hz and a second tone having a frequency of 1150 Hz is described. The inventive synthesizing circuitry requires only one clock oscillator, whose output is coupled to a programmable divider. The programmable divider is switched between two divisor numbers at a frequency that is substantially one-half of a frequency selected from a predetermined range of frequencies substantially midway between 770 Hz and 1150 Hz. In the preferred embodiment, the programmable divider output is switched between frequencies of 1250 Hz and 883.3 Hz at a 500 Hz rate. The programmable divider output is then interrupted at a 2 Hz rate to provide the synthesized busy signal. The inventive synthesizing circuitry may be advantageously utilized in mobile or portable radios for providing a busy signal that sounds essentially identical to a fast busy or reorder tone comprised of two tones.
摘要翻译： 描述用于合成由具有770Hz的频率的第一音调和具有1150Hz的频率的第二音调组成的繁忙或重新排序音的电路。 本发明的合成电路仅需要一个时钟振荡器，其输出耦合到可编程分频器。 可编程分频器在两个除数之间切换，频率基本上是从基本上在770Hz和1150Hz之间的一个预定频率范围内选出的频率的一半。 在优选实施例中，可编程分频器输出以500Hz速率在1250Hz和883.3Hz的频率之间切换。 然后可编程分频器输出以2 Hz的速率中断，以提供合成的忙信号。 本发明的合成电路可以有利地用于移动或便携式无线电装置中，用于提供与两个音调组成的快速繁忙或重新排序音基本相同的繁忙信号。
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公开(公告)号：US4392281A
公开(公告)日：1983-07-12
申请号：US232097
申请日：1981-02-06
申请人： Joseph R. Metz , Michael F. Barnes
发明人： Joseph R. Metz , Michael F. Barnes
CPC分类号： E05B65/0817 , Y10T24/4589 , Y10T292/0915
摘要： A releasable, hook-type fastener of the kind intended to secure pieces of equipment or structural members together, the fastener including a casing, a drive shaft turnable in the casing, an eccentric bushing carried by the casing and turnable with the shaft, and a pair of separate and distinct, similarly-shaped spring hooks that are disposed side by side and substantially in broadside contact with each other. At one end, the hooks have looped bearing portions which are frictionally engaged with the eccentric bushing, and at the other end they have registered bill portions. A pin is provided, separate from the hooks and adjacent to the eccentric bushing, for engagement with the hooks so as to maintain them in registration with one another. The arrangement is such that an unusually strong and sturdy construction results, without the need for heavy gauge springs and without the use of odd-shaped springs which would require special metal stock and bending fixtures or jigs for their fabrication.
摘要翻译： 一种用于将设备或结构构件固定在一起的类型的可释放的钩型紧固件，所述紧固件包括壳体，可在壳体中转动的驱动轴，由所述壳体承载并可与所述轴一起旋转的偏心衬套，以及 一对独立且独特的类似形状的弹簧钩，它们彼此并排并且基本上彼此宽边接触。 在一端，钩具有与偏心衬套摩擦接合的环形轴承部分，并且在另一端具有配准的纸币部分。 提供销，其与钩分离并且与偏心衬套相邻，用于与钩接合，以便使它们保持彼此对准。 这种布置使得结构非常坚固和坚固，不需要大型弹簧，而不需要使用需要特殊金属原料和弯曲夹具或夹具进行制造的奇怪形状的弹簧。
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