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2. Electromagnetic acoustic transducer - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_acoustic...

   Using piezoelectric transducer, the wave propagation angle in the test part is affected by Snell's law. As a result, a small variation in sensor deployment may cause a significant change in the refracted angle. Easier to generate SH-type waves. Using piezoelectric transducers, SH wave is difficult to couple to the test part.

3. Hunter Biden laptop controversy - Wikipedia

   en.wikipedia.org/wiki/Hunter_Biden_laptop...

   The Hunter Biden laptop story resulted in increased scrutiny of Twitter's and Facebook's actions in supposedly limiting the dissemination of the story by conservatives; [120] in an editorial, conservative news outlet The Washington Examiner wrote: "What is needed, not just on the laptop story but in general, is a major course correction by Big ...

4. Tonpilz - Wikipedia

   en.wikipedia.org/wiki/Tonpilz

   The term tonpilz or "acoustic mushroom" may refer to a certain type of underwater electro-acoustic transducer. By sandwiching active (i.e. piezoelectric or magnetostrictive) materials between a light, stiff radiating head mass and a heavy tail mass, the transducer can effectively operate as either a projector (source) or a hydrophone (underwater acoustic receiver).

5. Side-scan sonar - Wikipedia

   en.wikipedia.org/wiki/Side-scan_sonar

   The transducers were either contained in one hull-mounted package or with two packages on either side of the vessel. Next the transducers evolved to fan-shaped beams to produce a better "sonogram" or sonar image. In order to get closer to the bottom in deep water the side-scan transducers were placed in a "tow fish" and pulled by a tow cable.

6. Hook-and-loop fastener - Wikipedia

   en.wikipedia.org/wiki/Hook-and-loop_fastener

   Hook-and-loop fasteners, commonly known as Velcro (a genericized trademark), hook-and-pile fasteners or touch fasteners are versatile fastening devices that allow two surfaces to be repeatedly attached and detached with ease. Invented in the mid-20th century, they are widely used in clothing, accessories, and various industrial and consumer ...

7. Dynamic range - Wikipedia

   en.wikipedia.org/wiki/Dynamic_range

   Dynamic range (abbreviated DR, DNR, [1] or DYR [2]) is the ratio between the largest and smallest measurable values of a specific quantity. It is often used in the context of signals, like sound and light.