Ultrasonics | Physics, Sound Waves & Applications | Britannica
2024年12月11日 · 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.
Ultrasound - Wikipedia
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.
Basic Principles of Ultrasound – Ultrasound Physics and its
This chapter introduces the fundamental principles of sound wave propagation, including frequency, wavelength, amplitude, and velocity and how these relate to ultrasound imaging. The chapter also covers the interaction of ultrasound with …
Ultrasonics in Acoustics | High Frequency, Sound Waves
2024年5月28日 · Ultrasonics, a subfield of acoustics, deals with sound waves at frequencies beyond the upper limit of human hearing, typically above 20 kHz. This realm of high-frequency sound waves opens up a myriad of applications across various fields, from medical imaging to industrial cleaning.
Ultrasound Physics and Technical Facts for the Beginner
2020年7月16日 · Ultrasound refers to any sound waves with frequencies greater than 20kHz; Diagnostic ultrasound typically uses frequencies between 2 and 20 million Hertz (Megahertz - MHz) The propagation speed of an acoustic wave traveling through a specific medium is determined by the stiffness of that medium The greater the stiffness, the faster the wave ...
10 Properties of Ultrasonic Waves - BYJU'S
The sound waves of frequency greater than 20 kHz are called ultrasonic waves. These sound waves are not audible to the human ear. The term sonic applies to ultrasound waves of very high amplitude.
Applications of Ultrasonic Waves - GeeksforGeeks
2024年5月7日 · Sonar systems use ultrasonic waves to detect and locate objects underwater by emitting sound waves and measuring the time it takes for the echoes to return. This is crucial for navigation, underwater exploration, and fishing.
Ultrasonic Sound - HyperPhysics
Ultrasound imaging near the surface of the body is capable of resolutions less than a millimeter. The resolution decreases with the depth of penetration since lower frequencies must be used (the attenuation of the waves in tissue goes up with increasing frequency.)
The Physics and Technique of Ultrasound - Radiology Key
2017年6月4日 · Reflected mechanical sound waves are received by the transducer and converted back into electrical energy via the piezoelectric effect. The electrical energy is interpreted via software within the ultrasound instrument to generate …
Ultrasonics - Encyclopedia.com
2018年5月9日 · In the realm of physics, ultrasonics falls under the category of studies in sound. Sound itself fits within the larger heading of wave motion, which is in turn closely related to vibration, or harmonic (back-and-forth) motion.