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A tin can phone is a type of acoustic (non-electrical) speech-transmitting device made up of two tin cans, paper cups or similarly shaped items attached to either end of a taut string or wire. It is a particular case of mechanical telephony, where sound (i.e., vibrations in the air) is converted into vibrations along a liquid or solid medium ...
The acoustic tin can telephone, or "lovers' phone", has been known for centuries. [1] It connects two diaphragms with a taut string or wire, which transmits sound by mechanical vibrations from one to the other along the wire (and not by a modulated electric current). The classic example is the children's toy made by connecting the bottoms of ...
Cantennas can be used to increase cell phone range, [5] improve reception, and decrease noise. A cantenna can be used as a satellite dish feed horn. The 5.5 GHz cantenna dimensions are almost perfect in that they make a good fit for the standard TV satellite dish. The resulting setup is a low-cost high-quality high-gain antenna. [6]
Defibrillator phone box, Brent Pelham, Hertfordshire. Following a competition by a Girl Guide unit in 2011 to find a use for their local disused telephone box in Glendaruel, Argyll, it has been fitted with a defibrillator. The equipment can be accessed only by following instructions from the Scottish Ambulance Service during an emergency call ...
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Tin can telephone → Acoustic telephone – Not all acoustic telephones are made from tin cans. The 'tin can' telephone is only one type of acoustic telephone, and as other forms are included the article's title should properly reflect its broader scope. HarryZilber 14:22, 14 May 2013 (UTC) Oppose; whatever they're made of, they're still ...
The can saw very little change since then, although better technology brought 20% reduction in the use of steel, and 50% - in the use of tin [7] (the modern cans are 99.5% steel). [9] Canned food in tin cans was already quite popular in various countries when technological advancements in the 1920s lowered the cost of the cans even further.
The classic example is the tin can telephone, a children's toy made by connecting the two ends of a string to the bottoms of two metal cans, paper cups or similar items. The essential idea of this toy was that a diaphragm can collect voice sounds for reproduction at a distance.