Journal
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume 120, Issue 5, Pages EL55-EL61Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.2357187
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- NHLBI NIH HHS [R37HL40302] Funding Source: Medline
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The goal of this work was to show that the apparent negative dispersion of ultrasonic waves propagating in bone can arise from interference between fast and slow longitudinal modes, each exhibiting positive dispersion. Simulations were carried out using two approaches: one based on the Biot-Johnson model and one independent of that model. Results of the simulations are mutually consistent and appear to account for measurements from many laboratories that report that the phase velocity of ultrasonic waves propagating in cancellous bone decreases with increasing frequency (negative dispersion) in about 90% of specimens but increases with frequency in about 10%. (c) 2006 Acoustical Society of America.
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