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   Articles with "coupled ultrasound" as a keyword



Air-coupled ultrasound using broadband shock waves from piezoelectric spark igniters

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recommendations! Published in 2024 at "Applied Physics Letters"

DOI: 10.1063/5.0207969

Abstract: We used an optomechanical sensor to study the ultrasound generated by manually operated piezoelectric spark igniters. These low-energy sparks produce short-duration acoustic shock-wave pulses, with sub-microsecond rise times and frequency content extending well beyond 2 MHz… read more here.

Keywords: spark igniters; coupled ultrasound; air coupled; spark ... See more keywords

Air-Coupled Ultrasound Time Reversal (ACU-TR) For Subwavelength Nondestructive Imaging

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recommendations! Published in 2020 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"

DOI: 10.1109/tuffc.2019.2951312

Abstract: Air-coupled ultrasound (ACU) is increasingly used for nondestructive testing (NDT). With ACU, no contact or coupling agent (e.g., water and ultrasound gel) is needed between transducers and test sample, which provides high measurement reproducibility. However,… read more here.

Keywords: time; coupled ultrasound; air coupled; reversal acu ... See more keywords

In-vivo 3D corneal elasticity using air-coupled ultrasound optical coherence elastography.

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recommendations! Published in 2019 at "Biomedical optics express"

DOI: 10.1364/boe.10.006272

Abstract: Corneal elasticity can resist elastic deformations under intraocular pressure to maintain normal corneal shape, which has a great influence on corneal refractive function. Elastography can measure tissue elasticity and provide a powerful tool for clinical… read more here.

Keywords: coupled ultrasound; elasticity; corneal elasticity; air coupled ... See more keywords

Slight crack identification of cottonseed using air-coupled ultrasound with sound to image encoding

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recommendations! Published in 2022 at "Frontiers in Plant Science"

DOI: 10.3389/fpls.2022.956636

Abstract: Slight crack of cottonseed is a critical factor influencing the germination rate of cotton due to foamed acid or water entering cottonseed through testa. However, it is very difficult to detect cottonseed with slight crack… read more here.

Keywords: slight crack; coupled ultrasound; air coupled; method ... See more keywords