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[T458]The Five Major Religions
by Jon Kilminster, Jon

The first microphones were invented in the course of developing the telephone, a fact that's overlooked by many people but obvious when you think about it. Since then, microphones have come to be used in all manner of technology, from making records to performing live music, from dictaphones to personal computers.

Many devices such as tape recorders, video cameras and even some computers have built-in microphones. Other devices require external microphones, and even things with built-in mics often produce better-quality sound if an external mic is used.

There are five basic types of microphones, each using a different technology.

The first kind of microphone used carbon dust and little diaphragms to convert sound waves into electrical signals. Dynamic microphones use magnets to produce the same effect. Ribbon microphones use thin ribbons suspended in magnetic fields. Condenser microphones function as capacitors, often requiring a battery to create voltage. Finally, crystal microphones make use of the unique electrical properties of some crystals.

When it comes to personal computers, microphones can be handy for certain applications, though most users don't consider them a necessity for everyday computer usage. Some instant-message programs allow you to actually speak to the other person, provided both of you have microphones. Some people use their computers as miniature recording studios and thus need microphones to record their voices. And of course with podcasts becoming more and more popular, computer microphones are even more in-demand.

Microphones vary widely in price and quality. The cheapest ones start at around $20 for very basic, imprecise use. The most expensive ones can be several hundred dollars for intricate, state-of-the-art quality. Musicians' technicians often speak passionately about the brands and types of microphones they prefer, knowing their differences inside and out. To the average listener, though, they all sound about the same.


Though hydroponic growing began thousands of years ago, aeroponics is fairly new to the world of agriculture. In fact, it wasn't until the 1940's that scientists first successfully grew plants using air as a medium and it wasn't until the 1980's that new technology allowed aeroponics to be viable on a large scale.

Aeroponics may seem simple enough. After all, they sell miniature aeroponic systems through infomercials and on the Internet. But for the more serious hydroponics growers, aeroponics presents some unique challenges. First, it is a more delicate system and any mechanical malfunction or power outage will cause your roots to dry out very quickly. It is also an expensive system. But it also comes numerous advantages which should offset the costs and be more appealing to almost any hydroponics grower.

No Medium - Strictly speaking, an aeroponics system actually uses air as a medium. This has numerous advantages. First, it saves you a great deal of labor. It can be extremely labor intensive to line all of your grow trays or buckets with your medium every growing season. It can also be difficult to clean out your medium to make sure that there isn't any leftover organic material. Second, it is more beneficial to the environment. With no medium to dispose of, less hydroponic waste gets dumped in landfills. Since most bacteria that can potentially damage your plants usually grow and multiply in your medium, this can be less of a concern with aeroponics. And of course, it can be much easier on your pocketbook over time. You don't need to worry about purchasing more growing medium every growing season so there is no need to purchase any.

Efficient Use of Water - The plants grow in an aeroponic system by dangling their roots in a growing chamber that is kept at one hundred percent humidity. This is maintained by using misting nozzles that periodically spray more misted nutrient solution into the growing chamber. This means that very little water has to be used because the roots only suck up as much moisture as they need. This means you won't waste any of the nutrients or fertilizer you use in your reservoir. In fact, one of the reasons NASA became interested in aeroponics as a means to grow food aboard space shuttles is its efficient use of water.

Constant Contact With Air - With more traditional hydroponic growing, you have to sometimes bear in mind that some media hold air better than others which might require the mixing of the media or changing the medium entirely in order for your plants to properly thrive. This is never an issue with aeroponics. Since your roots dangle in the air, you can always be assured they always receive enough oxygen to grow to their full potential.

Faster growing - Some studies have shown that this method of growing can actually help your plants germinate and grow faster. When combined with the right type of nutrients, this can translate into extremely fast harvests and can allow you to enjoy the fruits (and vegetables) of your labor much much sooner.
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Both Jon Kilminster & Michael Straumietis are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.

Jon Kilminster has sinced written about articles on various topics from Home Management, Health and Air Purifier Cleaners. is packed with information on and. Jon Kilminster's top article generates over 550000 views. to your Favourites.

Michael Straumietis has sinced written about articles on various topics from Gardening, Gardening and Internet Marketing. Michael Straumietis is co-founder of Advanced Nutrients, an international marketer and manufacturer of agricultural, home & garden, hydroponics and soil less fertilizers and plant nutrients. If you would like to know more about. Michael Straumietis's top article generates over 8100 views. to your Favourites.
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