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01298 am a22001453u 4500 |
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349548 |
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|a dc
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|a Ramble, D.G.
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|a Phelps, A.D.
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|a Leighton, T.G.
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|a On the relation between surface waves on a bubble and the subharmonic combination-frequency emission
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|c 1998.
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|z Get fulltext
|u https://eprints.soton.ac.uk/349548/1/%2523%25201998%2520Ramble%2520et%2520al%2520%2528Acustica%2529%2520surface%2520waves.pdf
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|a The characterisation of bubbles using a two-frequency excitation technique is known to accurately detect and size certain bubble samples. This is done through the generation of a signal at Wi ± Wp/2 when the bubble is insonified by a fixed MHz imaging signal Wi and a variable pumping frequency, Wp , tuned to the bubble's resonance. Recent work has suggested that the principal mechanism for the generation of the Wi ± Wp /2 signal is linked to the onset of surface waves on the bubble's surface This paper strengthens this argument through the comparison of published experimentally measured thresholds for the Wi ±Wp /2 signal with recent theoretical models which predict the driving sound field pressure amplitudes required for the onset of surface waves on a spherical surface.
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