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 …

Ultrasound, or ultrasonography, works on the principle that sound is reflected at different speeds by tissues or substances of different densities. Ultrasound technology has been used medically since …

Feb 9, 2025 · Infrasonic and ultrasonic waves describe sounds outside the human hearing range, with unique applications in environmental monitoring and medical imaging, respectively.

Ultrasonic waves are sound waves with frequencies above the upper limit of human hearing, typically above 20 kHz. These waves propagate through different media such as liquids, gases, and solids.

Ultrasonics is the only internationally established journal which covers the entire spectrum of ultrasound research, technology, and applications. It contains a variety of sections to keep its readers abreast of …

Aug 6, 2023 · Ultrasound waves have higher frequencies than normal sound waves, but they also have shorter wavelengths. In other words, the distance between one ultrasound wave traveling through …

Dec 19, 2025 · 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 …

Ultrasonic waves are generated by a transmitter and detected by a receiver and are usually displayed on an oscilloscope or recorder. Two basic techniques in ultrasonics are (1) transmission and (2) reflection.

Ultrasonic scanning in medical diagnosis uses the same principle as sonar. Pulses of high-frequency ultrasound, generally above one megahertz, are created by a piezoelectric transducer and directed …

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