Acoustic measuring system
First Claim
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1. A remote terminal for use in an acoustic measuring system comprising:
- (a) a signal generating means for generating a reference signal,(b) an input connector supplied with an analog signal to be measured corresponding to said reference signal,(c) an amplifying means for preamplifying said analog signal,(d) analog-to-digital converter means for converting said analog signal to a digital signal,(e) memory means; and
(f) an input/output port suitable for bidirectional communication with a remote analyzing device;
said input connector being connected to said amplifying meams;
said amplifying means being connected to said analog-to-digital converter means;
said memory means being connected to said analog-to-digital converter means and operative to store digital signals generated by said analog-to-digital converter means;
said input/output ports being connected to said memory means.
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Abstract
A remote terminal for use in an acoustic measuring system comprises a measuring device including an input terminal supplied with an analog signal to be measured, an A/D converter for converting the analog signal to a digital signal and an output terminal for manifesting an analyzed result of the analog signal; an analyzing apparatus is used for processing the data of the digital signal and for generating the analyzed result. The measuring device and the analyzing apparatus are coupled by MODEMs to each other through a data transmission circuit.
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Citations
12 Claims
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1. A remote terminal for use in an acoustic measuring system comprising:
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(a) a signal generating means for generating a reference signal, (b) an input connector supplied with an analog signal to be measured corresponding to said reference signal, (c) an amplifying means for preamplifying said analog signal, (d) analog-to-digital converter means for converting said analog signal to a digital signal, (e) memory means; and (f) an input/output port suitable for bidirectional communication with a remote analyzing device; said input connector being connected to said amplifying meams; said amplifying means being connected to said analog-to-digital converter means; said memory means being connected to said analog-to-digital converter means and operative to store digital signals generated by said analog-to-digital converter means; said input/output ports being connected to said memory means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A remote terminal for use in an acoustic measuring system comprising:
- an input terminal;
a varible gain amplifier;
a level equalizer, switch means;
an anti-folding filter;
a peak level detector;
a sample and hold circuit;
an analog-to-digital converter;
memory means; and
a bi-directional input/output port;
said input terminal being connected to said variable gain amplifier;
the output of said variable gain amplifier being connected on one hand to an input to said level equalizer and on the other hand to a first input to said switch means;
an output from said level equalizer being connected to a second input to said switch means;
an output from said switch means being connected to an input to said anti-folding filter;
an output of said anti-folding filter being connected on one hand to an input to said sample and hold circuit and on the other hand to an input to said peak level detector;
an output from said peak level detector being connected to a gain varying input of said variable gain amplifier;
an output from said sample and hold circuit being connected to an input to said analog-to-digital converter;
an output from said analog-to-digital converter being connected to an input to said memory means;
an output from said memory means being connected to said input/output port.
- an input terminal;
Specification