-
10
-
-
84951376939
-
-
The principal value of the reverse tan function is termed “arctan,” thus, arctan [formula omitted]
-
-
-
-
11
-
-
84951376938
-
-
Z-Match is a registered trademark of Inficon Leybold-Heraeus Inc., East Syracuse, New York
-
-
-
-
12
-
-
84951376937
-
-
As compared to the definition given by Lu and Lewis (Ref. 9) in this paper the specific acoustic impedance ratio z is reciprocally defined. This is in consistency with the reduced parameters used here, each of which has the respective quartz parameter as denominator
-
-
-
-
25
-
-
84951376936
-
-
Data released by Inficon Leybold-Heraeus, Inc., East Syracuse, New York
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-
-
-
27
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-
84951367609
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-
Proceedings of the 31st Annual Symposium on Frequency Control, U.S. Army Electronics Research and Development Command, Fort Monmouth, New JerseyNTIS-National Technical Information Service, Accession No. AD423381
-
(1977)
, pp. 44-47
-
-
Tiersten, H.F.1
Smythe, R.C.2
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28
-
-
84951376718
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-
Leybold-Heraeus/Inficon patent pending in: FRG DE 3145309 Al, Austria A 5710/80, France 81.21976, England 81.35283, USA 32 46 23
-
(1981)
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-
Harms, K.C.1
Benes, E.2
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29
-
-
84951376717
-
-
For definitions of resonance frequency types refer to IEEE Standard No. 177 1966 ANSI C83. 17
-
(1970)
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-
-
32
-
-
84951376722
-
-
The principal arrangement is chosen according to DIN 45105, IEC as far as applicable to the derivation of the admittance versus frequency locus
-
(1978)
, vol.444
-
-
-
36
-
-
84951376721
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-
Here and throughout this paper sinusoidal time dependence is assumed. Time-varying quantities are expressed as phasors with suppressed [formula omitted] dependence of time t with ω being the angular frequency and j the imaginary unit. For example, the complex phasor force F at the regarded acoustic port corresponds to an instantaneous force given by [formula omitted] where Re means “the real part of.” The absolute value of the amplitude is indicated by [formula omitted]
-
-
-
-
37
-
-
84951376720
-
-
In the main part of this paper, v was used for the (constant) phase velocity of the acoustic wave, while in the Appendixes A and B v is used exclusively for the time dependent particle velocity, which, in the regarded case of shear waves, is the time derivative of the mechanical particle displacement in a direction transversal to the sound propagation
-
-
-
-
44
-
-
84951376719
-
-
For the determination of [formula omitted] and [formula omitted] nonetheless the piezoelectrically “stiffened” elastic constant has to be used by definition. The short circuiting of the electrodes causes a frequency lowering and thus, a decrease of the “stiffening” of the effective elastic constant [compare Eq. (8) and Eq. (C2) in Appendix C]
-
-
-
-
50
-
-
84951376704
-
-
Numerical subscripts are abbreviated subscripts according to Voigt’s notation
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-
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