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1,826 results
  • An experimental study of trailing edge noise from a heaving airfoil. [Journal Article]
    J Acoust Soc Am. 2020 Jun; 147(6):4020.Zhou T, Zhang X, Zhong S
  • In this study, the far-field noise and near-field flow properties from a heaving NACA 0012 airfoil at the Reynolds number of 6.6×104 were investigated experimentally in a 0.4 m2 anechoic wind tunnel. The airfoil had an incident angle of 0° and followed a sinusoidal heaving motion. The Strouhal number, controlled by changing the heaving frequency and amplitude, varied from 0.0024 to 0.008. The aco…
    Proc Meet Acoust. 2018 May 07; 33(1)Chu KM, Throckmorton CS, … Mainsah BO
  • In listening environments with room reverberation and background noise, cochlear implant (CI) users experience substantial difficulties in understanding speech. Because everyday environments have different combinations of reverberation and noise, there is a need to develop algorithms that can mitigate both effects to improve speech intelligibility. Desmond et al. (2014) developed a machine learni…
  • Sonographic Features of Salivary Glands in Sjögren's Syndrome and its Mimics. [Review]
    Curr Rheumatol Rep. 2020 Jun 19; 22(8):36.James-Goulbourne T, Murugesan V, Kissin EY
  • For 30 years, ultrasound has been investigated as a means to evaluate salivary gland abnormalities in patients with autoimmune disease. We aim to review the test characteristics of ultrasound for diagnosing Sjögren's syndrome, the scoring systems used for this purpose, and the ultrasound similarities and differences between Sjögren's syndrome and some of its potential salivary gland mimics.
  • Sonoanatomy of female reproductive organ of Sunda porcupine (Hystrix javanica). [Journal Article]
    Anat Histol Embryol. 2020 Jun 14 [Online ahead of print]Wahid MR, Prawira AY, … Fakhrul Ulum M
  • The conventional anatomical study of specimens requires cutting processes which destruct the limited specimens. A non-destructive method, namely an ultrasonography, can be used to assess the anatomical organ information of those specimens. The aim of this research is to analyse the macroanatomy of the female reproductive organ in the Sunda porcupine (Hystrix javanica), using ultrasonographical im…
  • Ultrasound and clinical characteristics of uterine smooth muscle tumors of uncertain malignant potential (STUMPs). [Journal Article]
    Eur J Obstet Gynecol Reprod Biol. 2020 May 25; 251:167-172.Cotrino I, Carosso A, … Zola P
  • CONCLUSIONS: Sonographic features of smooth muscle tumors of uncertain malignant potential may vary and a pathognomonic description has not been recognized. However, the identification of single or multiple lesions with specific ultrasound features should raise the suspicion of tumors of uncertain malignant potential. These features include isoechogenicity or mixed echogenicity, regular borders, presence of internal microcystic and anechoic areas, circumferential and intralesional vascularization ranging from minimal to high and absence of shadowing.
  • Experimental study of airfoil-rotor interaction noise by wavelet beamforming. [Journal Article]
    J Acoust Soc Am. 2020 May; 147(5):3248.Chen W, Peng B, … Huang X
  • A wavelet-based beamforming method is performed in this investigation to analyze moving acoustic sources in the time-frequency domain, which is of scientific significance and practical importance. The particular problem considered here is the interaction noise from an airfoil and the downstream rotor in the presence of a moving flow, which could find realistic applications in next-generation unde…
  • Triple-wide-band Ultra-thin Metasheet for transmission polarization conversion. [Journal Article]
    Sci Rep. 2020 Jun 01; 10(1):8810.Fahad AK, Ruan C, … He W
  • Polarization converters play an important role in modern communication systems, but their wide and multiple band operation to facilitate volume and size reduction is quite challenging. In this paper, a triple-band Linear Polarization to Circular Polarization (LP-to-CP) converter is presented using a novel design procedure based on geometric parameters optimization of a metasheet. The proposed con…
  • Temporal Arteritis in a Young Patient. A Clinical Case. [Case Reports]
    Reumatol Clin. 2020 May 28 [Online ahead of print]Blanco-Alonso S, Mellor-Pita S, … Tutor-Ureta P
  • CONCLUSIONS: Juvenile temporal arteritis is a very uncommon disorder. Systemic manifestations should be ruled out by physical examination and complementary tests. Histopathology establishes the definitive diagnosis. Treatment is surgical excision and a follow-up should be conducted to rule out complications.
  • Transvaginal ultrasound in evaluation and follow-up of ovarian granulosa cell tumors. [Journal Article]
    Int J Gynecol Cancer. 2020 May 30 [Online ahead of print]Petrone M, Bergamini A, … Mangili G
  • CONCLUSIONS: Our study showed that sonographic features and pattern recognition of relapses were comparable to those of tumors at primary diagnosis. In order to highlight the importance of transvaginal ultrasound evaluation during follow-up, further studies based on a standardized ultrasound characterization of ovarian masses are recommended.
  • [Cystic lymphangioma of the rectum-sigmoid in a public hospital in Lima-Peru: case report]. [Journal Article]
    Rev Gastroenterol Peru. 2020 Jan-Mar; 40(1):64-68.Zagaceta Torres W, Ramírez García JF, Chá Vez Rosell MÁN
  • Lymphangiomas are benign lesions due to a developmental malformation in the lymphatic system that occurs during the embryonic stage. They are more frequent in children. They can be found in the abdominal cavity, being the involvement of the gastrointestinal tract occasionally. The clinical presentation is varied, depending on the location of the lymphangiomas, and may have asymptomatic forms and,…
  • Vesicules or placental lakes in ultrasonography, determining the correct etiology. [Review]
    J Gynecol Obstet Hum Reprod. 2020 Apr 29 [Online ahead of print]Gavanier D, Berthet G, … Massardier J
  • The prenatal examination of the placenta is often an afterthought to that of the fetus in ultrasonography. Not giving the placenta its due may however result in potentially serious placental pathologies remaining undiscovered, notably in the presence of anechoic zones. These latter have earned numerous names, including "placental lakes", "placental venous lakes", "placental lacunae" or "placental…
  • Sensitivity of the human auditory cortex and reward network to reverberant musical stimuli. [Journal Article]
    J Acoust Soc Am. 2020 Apr; 147(4):2121.Lawless MS, Vigeant MC
  • A room's acoustics can alter subjective impressions of music, including preference. However, little research has characterized the brain's response to room conditions. Functional magnetic resonance imaging (fMRI) was used to investigate the auditory and reward responses to concert hall stimuli. Before the fMRI testing, 18 participants rated their preferences to a solo-instrumental passage and an …
  • Routine gynecological ultrasound: look at the bladder and the ureters! [Case Reports]
    Facts Views Vis Obgyn. 2020 Mar 27; 11(4):347-351.Vangoitsenhoven M, Vandenbroucke V, Van Den Bosch T
  • CONCLUSIONS: The bladder and pelvic part of the ureters are easily identifiable on transvaginal scan. Important pathology of the lower urinary tract and the distal ureters can be readily diagnosed by transvaginal ultrasound examination. The evaluation of the bladder and the ureters should therefore be part of the standard gynecological ultrasound investigation.
  • Five-channel fiber-based laser Doppler vibrometer for underwater acoustic field measurement. [Journal Article]
    Appl Opt. 2020 Jan 20; 59(3):676-682.Shang J, Liu Y, … He Y
  • In this paper, a 1550 nm five-channel all-fiber homodyne laser Doppler vibrometer with high sensitivity and good signal probing probability is presented. Under the anechoic tank, standing on an airborne platform above the water surface 3 m away, the calibration experiments of the designed system are conducted. The minimum detectable sound pressure level is up to 101.73 dB re 1 µPa at 10 kHz under…
  • Sirenomelia, case report and review of the literature. [Journal Article]
    J Matern Fetal Neonatal Med. 2020 Mar 26 [Online ahead of print]Morales-Roselló J, Loscalzo G, … Perales-Marín A
  • We present a case of sirenomelia diagnosed in the first trimester of pregnancy. The ultrasound examination showed fused lower extremities and an anechoic structure in the lower abdomen that is clue in the early diagnosis. The postmortem study showed the existence of a single umbilical artery (vitelline artery), with an origin in the abdominal aorta. This finding not only explained the presence of…
  • Anechoic recordings of Italian opera played by orchestra, choir, and soloists. [Journal Article]
    J Acoust Soc Am. 2020 Feb; 147(2):EL157.D'Orazio D
  • Auralisation-based research needs anechoic recordings. Where opera is concerned, anechoic material is limited to a few recordings. Using the approaches of previous recordings, the present work shows methods and results of a recording set focused on the Italian melodrama period. The chosen motifs come from scores of Donizetti, Verdi, and Puccini in order to consider the most performed composers an…
  • Amphibious hearing in a diving bird, the great cormorant (Phalacrocorax carbo sinensis). [Journal Article]
    J Exp Biol. 2020 Mar 17; 223(Pt 6)Larsen ON, Wahlberg M, Christensen-Dalsgaard J
  • Diving birds can spend several minutes underwater during pursuit-dive foraging. To find and capture prey, such as fish and squid, they probably need several senses in addition to vision. Cormorants, very efficient predators of fish, have unexpectedly low visual acuity underwater. So, underwater hearing may be an important sense, as for other diving animals. We measured auditory thresholds and ear…
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