Characteristics Of Sound

Sound in brief but remarkeable terms is a vibration, that our ears percieve by the sense of hearing. Most commonly vibrations travel to our ears via the air. The ear then converts these sound waves into nerve impulses that are sent to our brains, where the impulses become sound. To say all that in a more technical language: Sound “is an alternation in pressure, particle displacement, or particle velocity propagated in an elastic material” (Olson 1957). Sound is also a series of mechanical compressions and rarefactions or longitudinal waves that successively propagate through media that are at least a little compressible. What causes sound waves is known as “the source… Read More

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Who Was Nikola Tesla By Wally Jukes

Nikola Tesla was born on July 9, 1856, in a very small village called Smiljan, in the province of Lika, Croatia. You may not know who this man is, but he invented the theories of electricity we use today. Tesla finished his basic schooling in Croatia. He continued his education in the Polytechnic School in Graz and finished at University of Prague. He worked as an Electrical engineer in Germany, Hungary and France before coming to the United States in 1884 as an immigrant. When Tesla arrived in New York, he quickly obtained a job with Thomas Edison. Tesla worked for Edison for many years until finally there differences in… Read More

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The Invention Of Television

The transmission of images obsessed inventors as early as 1875 when George Carey of Boston proposed his cumbersome system. Only five years later, the principle of scanning a picture, line by line and frame by frame – still used in modern television sets – was proposed simultaneously in the USA (by W.E. Sawyer) and in France (by Maurice Leblanc). The first complete television system – using the newly discovered properties of selenium – was patented in Germany in 1884, by Paul Nipkow. Boris Rosing of Russia actually transmitted images in 1907. The idea to incorporated cathode -ray tubes was proposed in 1911 by a Scottish engineer, Campbell Swinton. Another Scot,… Read More

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Create Your Own Streaming Audio Studio

Creating your own Streaming Audio audio studio has never been easier. There are so many great products around today that will allow you to produce high quality streaming audio for a fraction of the price it used to cost. HARDWARE The first thing you will need is a compatible computer. Today every new computer is already set up with everything you will need. A basic sound card with a mic and line in jack. If you do not have a sound card they are very cheap and you can get a good one from any standard computer shop. Next you will need a good mic. These come in all sizes… Read More

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Perimeter Security Systems Airports

Perimeter Security systems are of utmost importance to “airport security”. With passenger lines stretching from here until tomorrow, airports could not function without proven perimeter security systems. The pictures of passengers patiently lined up before metal detectors shows acceptance for Airport security systems. The other, unacceptable option is failed Perimeter security systems leading to unthinkable 9-11 tragedies and empty planes in the skies. Accidental Entry – Airport Security People sometimes penetrate airport security by accident. For example, three boys on a sail boat wound up a runway at JFK airport. The intrusion led to upgraded airport Security regulations and enhanced perimeter security equipment. Yet, intrusion by innocent people is an… Read More

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