網頁Ultrasound is sound with frequencies greater than 20 kilohertz. [1] This frequency is the approximate upper audible limit of human hearing in healthy young adults. The physical principles of acoustic waves apply to any frequency range, including ultrasound.
網頁ultrasonics, vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz. The term sonic is applied to ultrasound waves of very high amplitudes. Hypersound, sometimes called praetersound or microsound, is sound waves of frequencies greater than 10 13 hertz.
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網頁For improving the detection of straight lines representing environment features, the ultrasonic and video data fusion procedure presented in the following section is used. 来自 Cambridge English Corpus
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網頁红： 次声波 、蓝： 可听声波 、绿： 超声波. 超声波 （英語： Ultrasound ），是指任何 聲波 或 振動 ，其 頻率 超過人類耳朵可以聽到的最高閾值20kHz（ 千赫 ）。. 超音波由於其高頻特性而被廣泛應用於醫學、工業、情報等眾多領域。. 某些動物，如 狗隻 、 海豚
網頁2023年8月6日 · 1) A high-frequency alternating electricity supply sends power to three piezoelectric transducers (2). These jiggle about at ultrasonic frequencies, sending their vibrations to a thin, quartz glass plate (3), which transmits waves (4) into a …
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網頁2021年5月20日 · 超音波感測器基於成熟和充分瞭解的物理原理，且相對簡單及多功能，加上低成本，因此經得起時間考驗。. 超音波感測器 常在多種消費型和工業應用中用於距離量測和存在偵測，也因此將繼續在未來用於更新和更具有挑戰性的應用。. 聲明：各作者及
網頁紅： 次聲波 、藍： 可聽聲波 、綠： 超音波. 超音波 （英語： Ultrasound ），是指任何 聲波 或 振動 ，其 頻率 超過人類耳朵可以聽到的最高閾值20kHz（ 千赫 ）。. 超音波由於其高頻特性而被廣泛應用於醫學、工業、情報等眾多領域。. 某些動物，如 狗隻 、 海豚
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網頁This ultrasonic treatment is an invasive technique because surface samples have to be cut out from the plant and studied in bath sonicators. 來自 Cambridge English Corpus. To apply this technique, a short burst of ultrasonic energy is generated, amplified and transmitted by a transducer. 來自 Cambridge English Corpus.
網頁2024年6月21日 · ultrasound, in medicine, the use of high-frequency sound (ultrasonic) waves to produce images of structures within the human body. Ultrasonic waves are sound waves that are above the range of sound audible to humans.
網頁Ultrasonics is the only internationally established journal which covers the entire spectrum of ultrasound research, technology and applications. Ultrasonics contains a variety of sections to keep its readers abreast of the state of the art in both fundamental investigation and real-world …. View full aims & scope.
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