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The effectiveness of any wire obstacle is greatly increased by planting anti-tank and blast antipersonnel mines in and around it. Additionally, connecting bounding anti-personnel mines (e.g. the PROM-1) to the obstacle with tripwires has the effect of booby-trapping the obstacle itself, hindering attempts to clear it.
The English concertina and the Duet concertina bear similarities in history and construction. Both systems generally play a chromatic scale and are unisonoric, with each key producing the same note whether the bellows are being pushed or pulled. Both of these English instruments are smaller than German concertinas, and are usually hexagonal in ...
Constantine probably came from a corruption/misunderstanding of concertina and led to confusion with the Roman Emperor Constantine. This, in turn, has led to some people trying to differentiate between concertina wire and constantine wire by assigning the term constantine wire to what is commonly known as razor wire.
Alf Edwards was a regular accompanist to both A. L. Lloyd and Ewan MacColl, and taught the instrument to Peggy Seeger. His virtuosic and reliable playing was a key element in the adoption of the English concertina by the English folk revival, featuring prominently on influential records such as The Iron Muse and on the Radio Ballads .
The bandoneon (Spanish: bandoneón) or bandonion is a type of concertina particularly popular in Argentina and Uruguay. It is a typical instrument in most tango ensembles. As with other members of the concertina family, it is held between the hands, and played by pulling and pushing air through bellows , routing it through sets of tuned metal ...
The concertina and bandoneon do not have the melody–accompaniment duality. The harmoneon is also related and, while having the descant vs. melody dualism, tries to make it less pronounced. The harmonium and American reed organ are in the same family, but are typically larger than an accordion and sit on a surface or the floor.
A moving line of cars, a situation susceptible to the accordion effect.. In physics, the accordion effect (also known as the slinky effect, concertina effect, elastic band effect, and string instability) occurs when fluctuations in the motion of a traveling body cause disruptions in the flow of elements following it.
The primary difference between concertina wire and razor wire is the shape of the razors. Concertina wire's razors are rectangularly shaped and will catch on your skin and clothes but are unlikely to cause anything more than superficial cuts. Razor wire's razors have pretty acute angles and could result in a nasty cut if you're careless around it.