Articoli di riviste: "Sound-waves"

1

Hults, Morris G. "Sound waves". Physics Teacher 39, n. 6 (settembre 2001): 377. http://dx.doi.org/10.1119/1.1531955.

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Wolf, Franz Josef. "Sound absorber for sound waves". Journal of the Acoustical Society of America 111, n. 6 (2002): 2535. http://dx.doi.org/10.1121/1.1492935.

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3

Dunkel, Jörn. "Rolling sound waves". Nature Materials 17, n. 9 (23 agosto 2018): 759–60. http://dx.doi.org/10.1038/s41563-018-0155-9.

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4

Jones, Willie. "Sound waves for brain waves - [update]". IEEE Spectrum 46, n. 1 (gennaio 2009): 16–17. http://dx.doi.org/10.1109/mspec.2009.4734300.

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5

Kenyon, Kern E. "Momentum of sound waves." Physics Essays 21, n. 1 (1 marzo 2008): 68–69. http://dx.doi.org/10.4006/1.3000091.

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6

Eisenstein, Daniel J., e Charles L. Bennett. "Cosmic sound waves rule". Physics Today 61, n. 4 (aprile 2008): 44–50. http://dx.doi.org/10.1063/1.2911177.

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7

Swinbanks, Malcolm A. "Attenuation of sound waves". Journal of the Acoustical Society of America 80, n. 4 (ottobre 1986): 1281. http://dx.doi.org/10.1121/1.394459.

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8

Swinbanks, Malcolm A. "Attenuation of sound waves". Journal of the Acoustical Society of America 81, n. 5 (maggio 1987): 1655. http://dx.doi.org/10.1121/1.395061.

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9

Ashley, Steven. "Sound Waves At Work". Mechanical Engineering 120, n. 03 (1 marzo 1998): 80–84. http://dx.doi.org/10.1115/1.1998-mar-2.

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Researchers have devised a new technique to use sound waves, opening the way for simple acoustic compressors, speedy chemical-process reactors, and clean electric-power generators. MacroSonix Corp. in Richmond, Vermont, has developed a technique by which standing sound waves resonating in specially shaped closed cavities can be loaded with thousands of times more energy than was previously possible. Company’s wave-shaping technology is known as resonant macrosonic synthesis (RMS). With some clever engineering, he said, the elevated acoustic-energy levels produced using RMS can be tapped for a wide range of industrial applications, including simplified compressors, pumps, speedy chemical-process reactors, and clean electric-power generators. MacroSonix has already licensed the RMS technology to a large appliance manufacturer to develop acoustic compressors for home refrigerators and air conditioners. MacroSonix has demonstrated the ability to produce high-pressure amplitudes inside resonator cavities. The MacroSonix technology relates to pressure waves in gases, which tend to be nonlinear in behavior. MacroSonix is working on a new licensing deal for an RMS air compressor and another with an electronic-component supplier. The company would like to enter larger research consortia with private, university, or government research labs to explore the RMS electric-power-generation concept.

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Kann, K. B. "Sound waves in foams". Colloids and Surfaces A: Physicochemical and Engineering Aspects 263, n. 1-3 (agosto 2005): 315–19. http://dx.doi.org/10.1016/j.colsurfa.2005.04.010.

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11

Birkhoff, Garrett. "Sound waves in fluids". Applied Numerical Mathematics 3, n. 1-2 (maggio 1987): 3–24. http://dx.doi.org/10.1016/0168-9274(87)90003-1.

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12

Buckingham, Michael J. "Sound waves and shear waves in sediments". Journal of the Acoustical Society of America 119, n. 5 (maggio 2006): 3275. http://dx.doi.org/10.1121/1.4808893.

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13

Gingold, Harry, Jianming She e William E. Zorumski. "Reflection of sound waves by sound‐speed inhomogeneities". Journal of the Acoustical Society of America 91, n. 3 (marzo 1992): 1262–69. http://dx.doi.org/10.1121/1.402509.

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14

Berntsen, Jarle, Jacqueline Naze Tjo/tta e Sigve Tjo/tta. "Interaction of sound waves. Part IV: Scattering of sound by sound". Journal of the Acoustical Society of America 86, n. 5 (novembre 1989): 1968–83. http://dx.doi.org/10.1121/1.398576.

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15

Schmitz, Kai. "LISA Sensitivity to Gravitational Waves from Sound Waves". Symmetry 12, n. 9 (9 settembre 2020): 1477. http://dx.doi.org/10.3390/sym12091477.

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Gravitational waves (GWs) produced by sound waves in the primordial plasma during a strong first-order phase transition in the early Universe are going to be a main target of the upcoming Laser Interferometer Space Antenna (LISA) experiment. In this short note, I draw a global picture of LISA’s expected sensitivity to this type of GW signal, based on the concept of peak-integrated sensitivity curves (PISCs) recently introduced in two previous papers. In particular, I use LISA’s PISC to perform a systematic comparison of several thousands of benchmark points in ten different particle physics models in a compact fashion. The presented analysis (i) retains the complete information on the optimal signal-to-noise ratio, (ii) allows for different power-law indices describing the spectral shape of the signal, (iii) accounts for galactic confusion noise from compact binaries, and (iv) exhibits the dependence of the expected sensitivity on the collected amount of data. An important outcome of this analysis is that, for the considered set of models, galactic confusion noise typically reduces the number of observable scenarios by roughly a factor of two, more or less independent of the observing time. The numerical results presented in this paper are also available in the online repository Zenodo.

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Shindo, Tomohiko, e Hiroaki Shimokawa. "Therapeutic Angiogenesis with Sound Waves". Annals of Vascular Diseases 13, n. 2 (25 giugno 2020): 116–25. http://dx.doi.org/10.3400/avd.ra.20-00010.

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17

Ho, Ai Phi Thuy. "The Beauty of Sound Waves". POCUS Journal 7, n. 1 (21 aprile 2022): 179. http://dx.doi.org/10.24908/pocus.v7i1.15314.

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18

Binh, Nguyen Dang. "Gestures Recognition from Sound Waves". EAI Endorsed Transactions on Context-aware Systems and Applications 3, n. 10 (12 settembre 2016): 151679. http://dx.doi.org/10.4108/eai.12-9-2016.151679.

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19

Wilk, Grzegorz, e Zbigniew Włodarczyk. "Sound waves in hadronic matter". EPJ Web of Conferences 172 (2018): 01002. http://dx.doi.org/10.1051/epjconf/201817201002.

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We argue that recent high energy CERN LHC experiments on transverse momenta distributions of produced particles provide us new, so far unnoticed and not fully appreciated, information on the underlying production processes. To this end we concentrate on the small (but persistent) log-periodic oscillations decorating the observed pT spectra and visible in the measured ratios R = σdata(pT) / σfit (pT). Because such spectra are described by quasi-power-like formulas characterised by two parameters: the power index n and scale parameter T (usually identified with temperature T), the observed logperiodic behaviour of the ratios R can originate either from suitable modifications of n or T (or both, but such a possibility is not discussed). In the first case n becomes a complex number and this can be related to scale invariance in the system, in the second the scale parameter T exhibits itself log-periodic oscillations which can be interpreted as the presence of some kind of sound waves forming in the collision system during the collision process, the wave number of which has a so-called self similar solution of the second kind. Because the first case was already widely discussed we concentrate on the second one and on its possible experimental consequences.

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20

Kielpinski, Dave. "Quantum sound waves stick together". Nature 527, n. 7576 (novembre 2015): 45–46. http://dx.doi.org/10.1038/527045a.

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21

Aygün, Müge, e Funda Aydın-Güç. "Superposition of sound waves: beats". Physics Education 54, n. 4 (17 maggio 2019): 043007. http://dx.doi.org/10.1088/1361-6552/ab1cf5.

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22

Schewe, Philip F. "Helium crystallization with sound waves". Physics Today 54, n. 7 (luglio 2001): 9. http://dx.doi.org/10.1063/1.2405647.

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23

White, J. E. "Underground sound: Applied seismic waves". Journal of the Acoustical Society of America 89, n. 4B (aprile 1991): 1900. http://dx.doi.org/10.1121/1.2029438.

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24

Nuwer, Rachel. "Wireless Charging with Sound Waves". Scientific American 311, n. 6 (18 novembre 2014): 52. http://dx.doi.org/10.1038/scientificamerican1214-52b.

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25

Joshi, Amey S. "Sound waves in polarized fluids". Physics of Fluids 31, n. 7 (luglio 2019): 076105. http://dx.doi.org/10.1063/1.5096369.

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26

Riordan, James R. "Sound waves make filters finer". Physics Today 55, n. 1 (gennaio 2002): 9. http://dx.doi.org/10.1063/1.4796515.

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27

Serdobolskaya, O. Yu, e G. P. Morozova. "Sound waves in polydomain ferroelectrics". Ferroelectrics 208-209, n. 1 (aprile 1998): 395–412. http://dx.doi.org/10.1080/00150199808014889.

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28

Suzuki, Yasuhiro. "Artificial Chemistry by Sound Waves". Proceedings of International Conference on Artificial Life and Robotics 22 (19 gennaio 2017): 599–602. http://dx.doi.org/10.5954/icarob.2017.os17-3.

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29

Khodusov, V. D., e A. S. Naumovets. "Second sound waves in diamond". Diamond and Related Materials 21 (gennaio 2012): 92–98. http://dx.doi.org/10.1016/j.diamond.2011.10.005.

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30

Kim, Joo Yeol, Hyo-Jun Lee, Jin A. Kim e Mi-Jeong Jeong. "Sound Waves Promote Arabidopsis thaliana Root Growth by Regulating Root Phytohormone Content". International Journal of Molecular Sciences 22, n. 11 (27 maggio 2021): 5739. http://dx.doi.org/10.3390/ijms22115739.

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Sound waves affect plants at the biochemical, physical, and genetic levels. However, the mechanisms by which plants respond to sound waves are largely unknown. Therefore, the aim of this study was to examine the effect of sound waves on Arabidopsis thaliana growth. The results of the study showed that Arabidopsis seeds exposed to sound waves (100 and 100 + 9k Hz) for 15 h per day for 3 day had significantly longer root growth than that in the control group. The root length and cell number in the root apical meristem were significantly affected by sound waves. Furthermore, genes involved in cell division were upregulated in seedlings exposed to sound waves. Root development was affected by the concentration and activity of some phytohormones, including cytokinin and auxin. Analysis of the expression levels of genes regulating cytokinin and auxin biosynthesis and signaling showed that cytokinin and ethylene signaling genes were downregulated, while auxin signaling and biosynthesis genes were upregulated in Arabidopsis exposed to sound waves. Additionally, the cytokinin and auxin concentrations of the roots of Arabidopsis plants increased and decreased, respectively, after exposure to sound waves. Our findings suggest that sound waves are potential agricultural tools for improving crop growth performance.

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31

Pozinkevych, Ruslan. "“Presenting of Sound and Non-Sound Waves Signal Analysis “". ECS Meeting Abstracts MA2022-01, n. 32 (7 luglio 2022): 2392. http://dx.doi.org/10.1149/ma2022-01322392mtgabs.

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Our research is an attempt to derive mathematical formula to describe the state of a system created by to or more waves resulting in a shockwave production The shockwave produced is a carrier of an energy that can be used for motion in gases and liquids To be able to utilize this energy we must be able to describe the state of a system of two or more waves at any given time thus deriving a formula that links energy produced to the component characteristics of the wave e.g frequency amplitude etc A mathematical model is used which presents a system of waves as a sum or difference of two vectors which is the resulting vector or a shockwave It is a model that has been obtained after using detailed analysis of both longitudinal and transverse waves To simplify the description we are going to look at the waves purely as a carrier of an energy that can further be utilized for different purposes and from that standpoint its easier to regard our waves and a resulting shockwave as a vector I am going to try and explain it from the point of view of mathematics Lets take a look at the sum (difference) of the two vectors The resulting sum (difference) vector is our sought shockwave which in itself is a carrier of energy In the attachment to my submission I am presenting a f-la of the wave as a carrier of energy Its a universal approach towards wave analysis and can be applied to different kind of waves acoustic and non acoustic In that sense analysis of the latter fits well into the agenda and will lead to a detailed explanation on how this principle works (pls see the attached file) Figure 1

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32

Machorro, Roberto, e E. C. Samano. "How Does It Sound? Young Interferometry Using Sound Waves". Physics Teacher 46, n. 7 (ottobre 2008): 410–12. http://dx.doi.org/10.1119/1.2981287.

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33

MKRTCHYAN, A. R., A. G. HAYRAPETYAN, B. V. KHACHATRYAN e R. G. PETROSYAN. "TRANSFORMATION OF SOUND AND ELECTROMAGNETIC WAVES IN NON-STATIONARY MEDIA". Modern Physics Letters B 24, n. 18 (20 luglio 2010): 1951–61. http://dx.doi.org/10.1142/s021798491002433x.

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Transformation (reflection and transmission) of sound and electromagnetic waves are considered in non-stationary media, properties of which abruptly change in time. Reflection and transmission coefficients for both amplitudes and intensities of sound and electromagnetic waves are obtained. Quantitative relations between the reflection and transmission coefficients for both sound and electromagnetic waves are given. The sum of the energy flux reflection and transmission coefficients for both types of waves is not equal to one (for sound waves it is greater than one). The energy of both waves is not conserved, that is, exchange of the energy occurs between the corresponding waves and medium. As a result, the sound wave obtains a notable property: the transmitting wave carries energy equal to the sum of the energies of the incident and reflected waves. A possibility of the amplification of sound waves and transformation of their frequencies is illustrated.

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34

Mawarni, L., R. R. Lahay e A. Fajari. "The timing of sonic bloom application on cabbage (Brassica oleraceae) for foliar fertilizer effectiveness". IOP Conference Series: Earth and Environmental Science 977, n. 1 (1 giugno 2022): 012024. http://dx.doi.org/10.1088/1755-1315/977/1/012024.

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Abstract Sonic bloom was a technology that used sound waves at 07.00–11.00 a.m. in the western part of Indonesia with a particular frequency to stimulate plant growth. This study aims to determine the effectiveness and best time for applying the foliar fertilizer with sound waves to cabbage plants. This research was conducted in Kuta Gugung Village, Naman Teran District, Karo Regency, from September 1st, 2020, to December 9th, 2020. The research method was a non-factorial randomized block design with four treatments and five replications, namely: application sound waves without fertilization (control), fertilization at 1 hour before application sound waves, fertilization carried out simultaneously with application sound waves, and fertilization carried out 1 hour after application sound waves. The results showed that the application of foliar fertilizer with sound waves significantly affected stomata exposure, making fertilizer more effective. To get the best stomata exposure, it was at 8.30 a.m., but the average selling weight of the crop was not significant.

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Hunstad, I., A. Marsili, P. Casale, M. Vallocchia e P. Burrato. "Seismic Waves and Sound Waves: From Earthquakes to Music". Seismological Research Letters 84, n. 3 (1 maggio 2013): 532–35. http://dx.doi.org/10.1785/0220120095.

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36

Buckingham, Michael J. "Sound waves and shear waves in saturated unconsolidated sediments". Journal of the Acoustical Society of America 120, n. 5 (novembre 2006): 3097. http://dx.doi.org/10.1121/1.4787524.

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37

Inoue, Kazuko, e Tomio Ariyasu. "Sound waves and shock waves in high-density deuterium". Laser and Particle Beams 9, n. 4 (dicembre 1991): 795–816. http://dx.doi.org/10.1017/s026303460000656x.

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The possibility of compressing the cryogenic hollow pellet of inertial confinement nuclear fusion with multiple adiabatic shock waves is discussed, on the basis of the estimation of the properties of a high-density deuterium plasma (1024−1027 cm−3, 10−1−104 eV), such as the velocity and the attenuation constant of the adiabatic sound wave, the width of the shock wave, and the surface tension.It is found that in the course of compression the wavelength of the adiabatic sound wave and the width of the weak shock wave sometimes become comparable to or exceed the fuel shell width of the pellet, and that the surface tension is negative. These results show that it is rather difficult to compress stably the hollow pellet with successive weak shock waves.

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38

Downie, Neil A. "Seeing sound waves: a simple method to see sound waves travelling through the open air". Physics Education 48, n. 2 (22 febbraio 2013): 199–202. http://dx.doi.org/10.1088/0031-9120/48/2/199.

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39

Uberoi, C. "Interaction of Flux Tubes with Sound Waves". Symposium - International Astronomical Union 142 (1990): 239–43. http://dx.doi.org/10.1017/s0074180900088008.

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The Landau damping of sound waves in a plasma consisting of ensemble of magnetic flux tubes is discussed. It is shown that sound waves cannot be Landau damped in general but under certain restricted conditions on plasma parameters the possibility of absorption of these waves can exist. The possibility of radiative damping of the acoustic waves along the magnetic filaments is also discussed. It appears that the most plausible mechanism of damping of sound waves in a plasma consisting of magnetic filaments can be due to scattering of a sound wave by the filaments.

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40

Li, Fangfang, Han Cao, Yinghui Jia, Yu Guo e Jun Qiu. "Interaction between Strong Sound Waves and Aerosol Droplets: Numerical Simulation". Water 14, n. 10 (23 maggio 2022): 1661. http://dx.doi.org/10.3390/w14101661.

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In this study, we attempted to eliminate atmospheric fog and aerosol particles by strong sound waves. The action of sound waves created an air disturbance, and the oscillation of the local air caused the micron-sized aerosol droplet particles to move. To provide guidance of the characteristics of the effective sound waves, this study numerically simulated aerosol droplet agglomeration under the action of sound waves, which was solved by coupling computational fluid dynamics (CFD) and discrete element methods (DEMs) as a typical two-phase flow problem in this study. The movements of aerosol droplet particles were simulated, as well as their agglomeration. The evolution process of the average particle size and the number of multimers were obtained, and the influence of different sound frequencies, sound pressure level (SPL), and particle spacing on agglomeration were studied. It was found that the promotion effect of low-frequency sound waves on aerosol droplet agglomeration was significantly higher than that of high-frequency sound waves, and the sound wave promotion effect of high SPLs was better than that of low SPL. In addition, the concept of the average agglomeration time required to quantify the acoustic agglomeration speed was proposed, and it was found to be positively correlated with sound frequency and particle spacing, while being negatively correlated with SPL.

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41

Dong, Weiguo, Qunli Wu e Shih Fu Ling. "Application of nonlinear interaction of sound waves in sound reproduction". Journal of the Acoustical Society of America 103, n. 5 (maggio 1998): 2810. http://dx.doi.org/10.1121/1.421557.

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42

Ratkiewicz, R., D. E. Innes e J. F. McKenzie. "Characteristics and Riemann invariants for multi-ion plasmas in the presence of Alfvén waves". Journal of Plasma Physics 52, n. 2 (ottobre 1994): 297–307. http://dx.doi.org/10.1017/s0022377800017918.

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In this paper the characteristics for a single- and a bi-ion plasma in the presence of Alfvén waves are given. In the single-ion case, the analysis is extended to the situation where Alfvén waves saturate and dissipatively heat the plasma. When there is no dissipation, there are three sound waves and one entropy wave in the single-ion plasma. Each sound wave is associated with two Riemann invariants relating the changes in density and wave pressure to changes in the flow. In the case when the Alfvén waves saturate and heat the plasma, there are two sound waves and one modified entropy sound wave. Each wave is associated with two Riemann invariants relating changes in density and entropy to changes in the flow. The analysis for the bi-ion plasma is simplified to very sub-Alfvénic flows. In this case the Alfvén waves behave like another plasma component, and both the electric and Alfvén wave forces have the same structure. The system possesses two entropy waves and four sound waves. Each sound wave is associated with two Riemann invariants relating changes in density and flow velocity along the characteristic curves.

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Brown, Geoff. "When Britannia Ruled the Sound Waves". Music, Sound, and the Moving Image 12, n. 2 (dicembre 2018): 93–119. http://dx.doi.org/10.3828/msmi.2018.7.

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Cowen, R. "Sound Waves May Drive Cosmic Structure". Science News 151, n. 2 (11 gennaio 1997): 21. http://dx.doi.org/10.2307/3980551.

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Kanigowska, Paulina, Yue Shen, Yijing Zheng, Susan Rosser e Yizhi Cai. "Smart DNA Fabrication Using Sound Waves". Journal of Laboratory Automation 21, n. 1 (febbraio 2016): 49–56. http://dx.doi.org/10.1177/2211068215593754.

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Kozlov, M. V., e C. J. McKinstrie. "Sound waves in two-ion plasmas". Physics of Plasmas 9, n. 9 (settembre 2002): 3783–93. http://dx.doi.org/10.1063/1.1494982.

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Crockett, Allen, e Wolfgang Rueckner. "Visualizing sound waves with schlieren optics". American Journal of Physics 86, n. 11 (novembre 2018): 870–76. http://dx.doi.org/10.1119/1.5042245.

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Atchley, Anthony. "Sound waves rev up heat engines". Physics World 12, n. 8 (agosto 1999): 21–22. http://dx.doi.org/10.1088/2058-7058/12/8/27.

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Jamieson, Valerie. "Sound waves deliver a faster pint". Physics World 14, n. 1 (gennaio 2001): 21. http://dx.doi.org/10.1088/2058-7058/14/1/23.

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50

Tindle, C. T. "Pressure and displacement in sound waves". American Journal of Physics 54, n. 8 (agosto 1986): 749–50. http://dx.doi.org/10.1119/1.14471.

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Articoli di riviste sul tema "Sound-waves"

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