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The reflection of Lamb waves at laminations
Solv¢nt structure in aqueous mtffitn_res, 2: Ionic mobil/ties in tert-lmtyl alcohol/water miffitmres at 25° Broadwater, T. L., Kay, R. L. Journal of Physical Chemistry, Vol 74 No 21 (October 1970) pp 3802-3812 Ultrasonic inspection of p r e s s u r e vessel welds and walls--mechanined and automated techniques Meyer, J. H. MaterialprQfung, Vol 12, No 10 (October 1970) pp 329336 (In German) The reflection of I.~mh waves at laminations Knop, K., Holler, P., Pohlman, R. MaterialprQfung, Vol 12, No 10 (October 1970) pp 351-353 Quenching of ultrasonic waves in aqueous solutions
of nucleic acids Elpiner, I. E., Sadikhova, S. K., Braginskaya, F. I. Biophysica, Vol 15, No 1 (1970) pp 26-30 (In Russian) The timing of the main and secondary flashes of sonoluminescence from acoustically cavitated water Jarman, P. D., Taylor, K. J. Acustica, Vol 23, No 5 (November 1970) pp 243-251 Investigations on resonance absorbers for under~r,d e r SOUnd employing viscous losses in fluid films Siebrasse, K-F. Acusttca, Vol 23, No 5 (November 1970)pp 251-260 (In German) Ultrasonic absorption in binary liquid mixtures of unassociated liquids Venkateshwarlu, M., Sivarama Sastry, G. Acustica, Vol 23, No 5 (November 1970) pp 261-264 Model studies on sound r a d i ~ o n from metal and periodic structures by Schlleren optics Plass, K. G.
Acustica, Vol 23, No 5 (November 1970) pp 265-268 (In German) The reciprocal measurement of mechanical-acousUcal tr an s f er functions Steenhoek, H. F., ten Wolde, T. Acustica, Vol 23, No 5 (November 1970) pp 301-305 The tuvariant form of linear twin-property constitutive equations and its application to piezoelectricity Baerwald, H. G. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 210-223 Rayleigh wave analysis by iterative techniques Blackledge, V. O. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 224-226 Direct electromagneUc generation of compressional w a v e s in metals in static magneUc fields
Grub/n, H. L. Sonics and Ultrasonlcs, Vol SU-17, No 4 (October 1970) pp 227-229 Symmetry considerations for elastic layer modes propagating in antsotropic piezoelectric crystals Farne11, G. W. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 229-238
IAthinm tantalate and lithium alobate piezoelectric resonators in the medium frequency range with low ratios of capacitance and low temperature coefficients of frequency Harmon, J. J., Lloyd, P., Smith, R. I. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 239-246 'Elastic' Poynting vector in a piezoelectric medium Havlice, J. F., Bond, W. L., Wigton, L. B. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 246-249 Acoustic beacon systems Plessey Co Ltd British Patent 1,212,507 (1970) A submersible beacon generates at least two acoustic signals, the lowest frequency signal giving an approximate indication of beacon position, and the highest a more precise indication. The beacon is moored to a lead acid power supply battery. Echo SOUDtBng Electroacoustlc GmbH British Patent 1,212,734 (1970) Tr~nm~lcers National Research Development Corp British Patent 1,205, 554 (1970) Burglar .]~,'ms Memco Ltd British Patent 1,205, 636 (1970) A centimetric Doppler radar has separated radiating and receiving apertures and a circuit connected to a band-pass amplifier to provide signals signifying the presence and absence of Doppler beat frequencies within the selected range of frequencies. The aerials may be horns and the radiative horn may be shaped to give a radiation curtain. Ultrasonic flowmeter Tokyo Kelki Seizosho Co Ltd British Patent 1,200, 349 (1970) Two non-parallel ultrasonic propagation paths are provided between opposite side walls of a flow conduit in a plane containing two parallel straight lines in the walls and with inclination angles relative to the two lines being supplementary. An average of the differences between the propagation speeds or times in the downstream and upstream directions is derived for the two paths. The 'sing around' method, in which receipt of an ultrasonic pulse by one transducer initiates transmission of a pulse from the other transducer, is used to generate two repetition frequencies f3, f4 for propagation downstream and upstream respectively, and f3-f4 gives the measure of flow velocity. The flow velocity is finally determined from the arithmetic mean of similar frequencies. In different embodiments, phase difference or pulse propagation time difference methods may be used. Ultrasonic inspection devices: gain control Vsesojuzny Nauchno-Issledovatelsky I Konstruktorsky Institut Khimicheskogo Maschinostorenia British Patent 1,200, 378 (1970) For determining whether the internal structure of a test object differs from that of a reference specimen ULTRASONICS April 1971
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of nucleic acids Elpiner, I. E., Sadikhova, S. K., Braginskaya, F. I. Biophysica, Vol 15, No 1 (1970) pp 26-30 (In Russian) The timing of the main and secondary flashes of sonoluminescence from acoustically cavitated water Jarman, P. D., Taylor, K. J. Acustica, Vol 23, No 5 (November 1970) pp 243-251 Investigations on resonance absorbers for under~r,d e r SOUnd employing viscous losses in fluid films Siebrasse, K-F. Acusttca, Vol 23, No 5 (November 1970)pp 251-260 (In German) Ultrasonic absorption in binary liquid mixtures of unassociated liquids Venkateshwarlu, M., Sivarama Sastry, G. Acustica, Vol 23, No 5 (November 1970) pp 261-264 Model studies on sound r a d i ~ o n from metal and periodic structures by Schlleren optics Plass, K. G.
Acustica, Vol 23, No 5 (November 1970) pp 265-268 (In German) The reciprocal measurement of mechanical-acousUcal tr an s f er functions Steenhoek, H. F., ten Wolde, T. Acustica, Vol 23, No 5 (November 1970) pp 301-305 The tuvariant form of linear twin-property constitutive equations and its application to piezoelectricity Baerwald, H. G. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 210-223 Rayleigh wave analysis by iterative techniques Blackledge, V. O. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 224-226 Direct electromagneUc generation of compressional w a v e s in metals in static magneUc fields
Grub/n, H. L. Sonics and Ultrasonlcs, Vol SU-17, No 4 (October 1970) pp 227-229 Symmetry considerations for elastic layer modes propagating in antsotropic piezoelectric crystals Farne11, G. W. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 229-238
IAthinm tantalate and lithium alobate piezoelectric resonators in the medium frequency range with low ratios of capacitance and low temperature coefficients of frequency Harmon, J. J., Lloyd, P., Smith, R. I. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 239-246 'Elastic' Poynting vector in a piezoelectric medium Havlice, J. F., Bond, W. L., Wigton, L. B. Sonics and Ultrasonics, Vol SU-17, No 4 (October 1970) pp 246-249 Acoustic beacon systems Plessey Co Ltd British Patent 1,212,507 (1970) A submersible beacon generates at least two acoustic signals, the lowest frequency signal giving an approximate indication of beacon position, and the highest a more precise indication. The beacon is moored to a lead acid power supply battery. Echo SOUDtBng Electroacoustlc GmbH British Patent 1,212,734 (1970) Tr~nm~lcers National Research Development Corp British Patent 1,205, 554 (1970) Burglar .]~,'ms Memco Ltd British Patent 1,205, 636 (1970) A centimetric Doppler radar has separated radiating and receiving apertures and a circuit connected to a band-pass amplifier to provide signals signifying the presence and absence of Doppler beat frequencies within the selected range of frequencies. The aerials may be horns and the radiative horn may be shaped to give a radiation curtain. Ultrasonic flowmeter Tokyo Kelki Seizosho Co Ltd British Patent 1,200, 349 (1970) Two non-parallel ultrasonic propagation paths are provided between opposite side walls of a flow conduit in a plane containing two parallel straight lines in the walls and with inclination angles relative to the two lines being supplementary. An average of the differences between the propagation speeds or times in the downstream and upstream directions is derived for the two paths. The 'sing around' method, in which receipt of an ultrasonic pulse by one transducer initiates transmission of a pulse from the other transducer, is used to generate two repetition frequencies f3, f4 for propagation downstream and upstream respectively, and f3-f4 gives the measure of flow velocity. The flow velocity is finally determined from the arithmetic mean of similar frequencies. In different embodiments, phase difference or pulse propagation time difference methods may be used. Ultrasonic inspection devices: gain control Vsesojuzny Nauchno-Issledovatelsky I Konstruktorsky Institut Khimicheskogo Maschinostorenia British Patent 1,200, 378 (1970) For determining whether the internal structure of a test object differs from that of a reference specimen ULTRASONICS April 1971
125