Sound attenuation and anharmonic damping in solids with correlated disorder
نویسندگان
چکیده
W. Schirmacher1,2, C. Tomaras3, B. Schmid2, G. Baldi4, G. Viliani5 , G. Ruocco6,7, T. Scopigno6,7 1 Physik-Department E13, Technische Universität München, James-Franck-Strasse 1, D–85747 Garching, Germany 2 Fachbereich Physik, Universität Mainz, Germany 3 Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, Theresienstr. 37, D–80333 München, Germany 4 ESRF Grenoble 5 Dipt. di Fisica, Universitá di Trento, Italy 6 Dipt. di Fisica, Universitá di Roma, Italy 7 IPCF-CNR, Sezione di Roma, c/o Sapienza Universita’ di Roma, Italy
منابع مشابه
Acoustic dynamics of network-forming glasses at mesoscopic wavelengths
The lack of long-range structural order in amorphous solids induces well known thermodynamic anomalies, which are the manifestation of distinct peculiarities in the vibrational spectrum. Although the impact of such anomalies vanishes in the long wavelength, elastic continuum limit, it dominates at length scales comparable to interatomic distances, implying an intermediate transition regime stil...
متن کاملAcoustic damping performance of aluminum nanocomposite foams with different additive of carbon nanotubes and comparison that with conventional rockwool (Research Article)
Open cell aluminum foams have good acoustic dampening properties. In this research, in order to improve the sound damping capacity of these foams, 0.9, 1.5 and 3wt% carbon nanotubes were added to the aluminum foam. Foams were produced by the space holder method in powder metallurgy. The results showed that Al-0.9wt%CNT nanocomposite foam had the highest average sound transmission loss in the fr...
متن کاملThe Ability of Ultrasonic Characterization to Extract the Dose Distribution of MAGIC-f Polymer Gel
Background & Aims: Today, different imaging techniques have been studied in the reading of radiationsensitive polymer gels dosage. Due to limitations of imaging techniques such as magnetic resonance imaging (MRI) and computed tomography (CT), ultrasound techniques are proposed for dose-dependent parameter extraction. In this study, using MAGIC-f (methacrylic and ascorbic acid in gelatin initiat...
متن کاملEffect of porosity on the characteristics of underwater acoustic sound absorbers using theoretical models
Porous materials have good acoustic damping characteristics over a wide frequency range. As for sound waves, many small-scale pores in the coating materials can convert underwater-coating to rough surfaces. The main property of porous absorbents is their resistance against incident sound wave that leads to damping effect. From a physical point of view, damping occurs due to friction between flu...
متن کاملReplica field theory for anharmonic sound attenuation in glasses
Article history: Received 12 April 2010 Received in revised form 14 May 2010 Available online xxxx
متن کامل