JASA – Recently Published

• The influence of droplet concentration on phase change and inertial cavitation thresholds associated with acoustic droplet vaporization October 23, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page EL375-EL381, October 2020. Acoustic droplet vaporization (ADV) is an important process that enables the theragnostic application of acoustically activated droplets, where the nucleation of inertial cavitation (IC) activity must be precisely controlled. This Letter describes threshold pressure measurements for ADV and acoustic […]
  Yanye Yang
• Phase speed in water-saturated sand and glass beads at MHz frequencies October 23, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page 2301-2310, October 2020. Measurements of the phase velocity of compressional sound waves in water-saturated granular materials are reported for the 1.0–2.0 MHz frequency range. The sound speed estimates are based on travel times through granular layer thicknesses ranging from 8 to 17 mm. Three […]
  Jenna Hare
• Effect of speech volume on respiratory emission of oral bacteria as a potential indicator of pathogen transmissibility risk October 23, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page 2322-2326, October 2020. Respiratory droplets emitted during speech can transmit oral bacteria and infectious viruses to others, including COVID-19. Loud speech can generate significantly higher numbers of potentially infectious respiratory droplets. This study assessed the effect of speech volume on respiratory emission […]
  Riyakumari K. Patel
• Nonlinear ultrasound simulation in an axisymmetric coordinate system using a k-space pseudospectral method October 23, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page 2288-2300, October 2020. A full-wave model for nonlinear ultrasound propagation through a heterogeneous and absorbing medium in an axisymmetric coordinate system is developed. The model equations are solved using a nonstandard or k-space pseudospectral time domain method. Spatial gradients in the axial […]
  Bradley E. Treeby
• A Fourier transform formulation for radiation from an unbaffled cylinder October 23, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page 2311-2321, October 2020. A formulation based on the Fourier transform and generalized functions, and implemented with a fast Fourier transform, is developed to solve a classic acoustics problem: radiation from an unbaffled cylinder with flat endcaps. The endcaps as well as the […]
  Earl G. Williams
• Sparse direct adaptive equalization based on proportionate recursive least squares algorithm for multiple-input multiple-output underwater acoustic communications October 22, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page 2280-2287, October 2020. In this paper, the sparse direct adaptive equalization based on the recently developed proportionate recursive least squares (PRLS) adaptive filtering algorithm is investigated for multiple-input multiple-output (MIMO) underwater acoustic (UWA) communications. First, performance analysis is made for the PRLS, […]
  Zhen Qin
• Blind deconvolution of sources of opportunity in ocean waveguides using bilinear channel models October 22, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page 2267-2279, October 2020. A general blind deconvolution algorithmic framework is developed for sources of opportunity (e.g., ships at known locations) in an ocean waveguide. Here, both channel impulse responses (CIRs) and unknown source signals need to be simultaneously estimated from only the […]
  Ning Tian
• Experimental observations of a rupture induced underwater sound source October 22, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page EL370-EL374, October 2020. A rupture induced underwater sound source (RIUSS) is being developed as an alternative to other impulsive sound sources commonly utilized in underwater acoustics experiments and surveys. The device is comprised of a graphite rupture disk mounted over an evacuated […]
  Andrew R. McNeese
• Evaluation of capacitive micromachined ultrasonic transducers for passive monitoring of microbubble-assisted ultrasound therapies October 21, 2020
  The Journal of the Acoustical Society of America, Volume 148, Issue 4, Page 2248-2255, October 2020. Passive cavitation detection can be performed to monitor microbubble activity during brain therapy. Microbubbles under ultrasound exposure generate a response characterized by multiple nonlinear emissions. Here, the wide bandwidth of capacitive micromachined ultrasonic transducers (CMUTs) was exploited to monitor […]
  Ambre Dauba