in equation (A. 12) and Figure A-2(b). There is a critical frequency ratio, = 2^k, at which U2 leads (instead of lags) Qv . Although amplitude attenuation of the input flux can be significantly increased for small k, this effect is offset somewhat by the increased temperature of block 1, equation (A.6), which would require additional insulation to limit heat loss to xQl. Another way to illustrate the attenuation effect is to equate equation (A.4) and equation (A. 11), and determine fraction f for equal attenuations. This is shown in Figure A-3, where it is seen that f < 1 for all of the conductance and frequency ratios shown. Hence, it is possible to find or design an internal conductance (k > 0) which reduces the original mass. This shows that, by attenuation (interference) of the source flux signal, a significantly smaller mass can be used to limit the output amplitude to specified magnitudes.
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