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velocimeter |
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velocimeter [‚vel·ə′sim·əd·ər] (engineering) An instrument for measuring the speed of sound in water; two transducers transmit acoustic pulses back and forth over a path of fixed length, each transducer immediately initiating a pulse upon receiving the previous one; the number of pulses occurring in a unit time is measured. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| 41)(p39) In a review article, Haynes (27) concluded that tests of vertebral artery patency using positional changes of the head and neck lack validity and recommended Doppler ultrasound velocimetry as an alternative. In answering this question, these researchers used digital particle image velocimetry (DPIV) to study the way a fluid flows past a channel terminated by a partial blockage. In vitro studies with laser Doppler velocimetry revealed a broadband and flat frequency response from 50 Hz to 10 kHz, producing power equivalent to 100dB at 1 kHz and up to 130 dB at 7 kHz (figure 3). |
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