Search results
Results from the WOW.Com Content Network
Reflected ultrasound comes from an interface, such as the back wall of the object or from an imperfection within the object. The diagnostic machine displays these results in the form of a signal with an amplitude representing the intensity of the reflection and the distance, representing the arrival time of the reflection.
Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US gal), to large industrial units with volumes approaching 1,000 litres (260 US gal).
Ultrasound is used to clean jewellery, weld rubber, treat abscesses, and sonography. These applications rely on the interaction of sound with the media through which the sound travels. In maritime applications, ultrasound is the key ingredient in sonar; sonar relies on sound at frequences ranging from infrasonic to ultrasonic.
Ultrasound is defined by the American National Standards Institute as "sound at frequencies greater than 20 kHz". In air at atmospheric pressure, ultrasonic waves have wavelengths of 1.9 cm or less. Ultrasound can be generated at very high frequencies; ultrasound is used for sonochemistry at frequencies up to multiple hundreds of kilohertz.
Ultrasonic welding of thin metallic foils. The sonotrode is rotated along the weld seam.. Ultrasonic welding is an industrial process whereby high-frequency ultrasonic acoustic vibrations are locally applied to work pieces being held together under pressure to create a solid-state weld.
Influential Ibiza club legend DJ Alfredo has died. He was 71 years old. News of his death was confirmed by Club Amnesia, where he had a residency DJing in the 1980s, on Tuesday, Dec. 24. "Dear ...
The ACE Self-Assessment Program (ASAP) is a continuing medical educational (CME) program that provides a full curriculum with up-to-date information about the evaluation, diagnosis, treatment and management of endocrine system diseases. ASAP assists endocrinologists in preparation and maintenance of their sub-specialty certification.
“Elton John was my piano player back in the day,” the Grammy winner shared. “And so his band would come to my flat after the shows and we would play cards for money.