The following article has been donated by Tammy Sampson of Everdrive.com, which provides used auto parts, Ford parts, and Honda parts.

The purpose of your car’s monstrous ignition system is to time a spark that ignites gas at the precise moment needed to power your engine. Several different parts work together to make this happen. Your car’s engine is basically a huge pump. Air and gas are pumped in, producing energy that turns the tires and moves the vehicle. That’s an oversimplification, but sufficient for learning how the components of the system work. Below, I’ll briefly describe the parts involved and take you through the process of igniting the gas and powering your engine.

Parts And Their Jobs

Your ignition system is comprised of spark plugs, a distributor (and cap), rotor, and coil. The coil is what transforms an electrical current from your car battery into a spark. When the coil successfully creates a spark (and it needs to be potent enough to actually ignite the fuel), the spark is transferred to your car’s distributor. The reason it’s called a distributor is because it spins and allocates the sparks from the coil to multiple spark plugs. It does that through the rotor.

The rotor spins with the distributor and contacts the cylinders of the engine. When it does this, it transfers the sparks to the spark plug wires. At this point, the spark has nearly traveled to where it needs to be. Each of the spark plug wires is attached to the distributor cap through its own contact point. Those wires send the spark directly to the spark plugs which are mounted in your car’s cylinder head. When the gases from the fuel flow into the cylinder, the spark ignites them, causing combustion.

The process I’ve just described happens over and over, tens of thousands of times while your car is in operation.

A Seamless System

Your ignition system is most effective when the sparks are precisely timed. In the past, this was done by employing a points-and-condenser module to tell the distributor when to allocate the sparks to the spark plugs. Today, most cars are equipped with computers (called ignition modules) that control the timing. They do so by notifying your car’s engine control unit about the placement of the pistons. If an ignition module fails, it’s usually necessary to replace it.

Over the past few years, manufacturers have begun experimenting with “distributorless” ignition systems. Rather than a single coil creating the sparks needed to ignite the fuel, each spark plug has its own coil. That effectively eliminates the need for the distributor. It’s still considered a young technology, but holds significant promise.

Sure, you probably already know that Empire Covers is a leading provider of car covers, but what you might not know is that they do more than car covers. Besides all of the car and truck covers they offer, Empire Covers also carries an extensive line of boat covers, ATV covers, snowmobile covers, and motorcycle covers. Thanks to Empire Covers you can get all of your vehicle covers from one spot, saving you time and money. Whatever type of cover you need, Empire Covers is sure to have it, so take a look at their selection and pick out the one or ones that fits your needs the best. I think you’ll be happy you did.

There is a lot of confusion about how noise cancelation headphones work so I thought I’d take a moment and answer a few questions about how they work and provide a little advice to anyone shopping for a good set of noise reduction headphones.

Active or Passive Noise Cancelation

There are two main types of headphones that block sound. Some headphones block sound by sampling the ambient noise with tiny microphones built into the headphones. Then an “equal but opposite” cancelation sound wave is generated inside of the ear cups to “cancel” the sound you hear. This technology is call active noise cancelation and is very effective at blocking consistent, rumbling or humming noises like the airplane engine noise you hear when flying or the sound of an air conditioner or fan. It is “active” because there are microphones and electronics actively trying to sample the ambient noise and then figure out how to cancel it before it reaches your ears. Active noise cancelation headphones tend to be fairly compact in size and some models sit on your ear rather than having the ear cups enclose or surround your ear. Active noise cancelation headphones always require batteries to run the electronics that cancel the sound. When the batteries die, so does the noise cancelation - and sometimes, depending on the set of headphones, you can’t hear any music at all if your headphone batteries die. Also, active noise cancelation headphones produce a hissy swoosh noise inside of the ear cups. This is the “canceling” sound wave. It makes your music sound like there is a hissing staic in the background which I hate. I like clear audio and active noise cancelation headphones do not really produce very clear sound.

The other type of noise blocking headphones are passive noise reduction or passive noise cancelation headphones. Passive noise cancelation headphones work by physically blocking the sound from reaching your ears. The ear cups have closed backs and totally enclose your ear. This style of headphones tend to be a bit bulkier than active noise cancelation headphones because the ear cups are packed with noise isolation foam and the ear cups need to be large enough to totally enclose your ears and protect them from sound. Passive noise reduction headphones like the Direct Sound Extreme Isolation Headphones are generally much better at blocking sound and also significantly less expensive. There has been a great deal of marketing hype around fancy headphones like the Bose Quiet Comfort headphones, but the truth is that the headphones at QuietHeadphones.com actually block more noise. For example, the EX-29 Extreme Isolation headphones will reduce noise by 29dB across the entire audio spectrum - low noises and high pitched noises alike. Active noise reduction heapdhones only block 12dB to 17dB of sound. Also, since passive noise reduction headphones do not produce that canceling sound wave, the audio is crystal clear. With the studio quality speakers in the EX-29 headphones you will hear the fine details of your music that you have may have never heard before.

Blocking Noisy Voices

If you need to block out office chatter, TVs, phones ringing and other spiky sounds like that, your only option is a good set of passive noise reduction headphones and a white noise audio track. Active noise cancelation headphones can’t calculate a canceling sound wave fast enough to block out these types of sounds. Passive noise reduction headphones, however, block out all types of sounds. No matter what type of headphones you choose you will still be able to hear background noise. It would take over 60dB of sound reduction to provide complete silence and that is only achieved in expensive recording studios. Headphones simply can’t block that much noise so there is going to be some background noise that you hear. But if you listen to a white noise audio track (comes free with your purchase at QuietHeadphones.com) you can mask out virtually all background noise. This is a GREAT solution if you need to concentrate or study.

Do I Need Batteries?

Another really important thing to consider is the ongoing cost of having to replace batteries every month in active noise cancelation headphones. With the Extreme Isolation headphones there are no ongoing costs because they do not use batteries. So be sure to figure the cost of 2 AAA batteries per month into your budget if you are considering the purchase of active noise cancelation headphones. Let me also reissue the warning that if your batteries die on you, your headphones may stop working altogether and you will certainly lose your noise cancelation feature.

Leaking Noise

One last point before I summarize why I recommend the the Extreme Isolation headphones, and passive noise reduction headphones in general, is not only do they block outside sound from coming in, they keep your music from leaking out and disturbing other people. Some people even use the EX-29 Extreme Isolation headphones in studios where sound leaking out of the headphones and into microphones can be a real problem. With the EX-29 Extreme isolation headphones you can start listening to some music then take the headphones off and press the ear cups together. You will be amazed when you realize that virtually ALL of the sound is kept within the headphones. At normal listening levels, if you take the headphones off your head and press the ear cups together you can’t hear any sound leaking out.

Summary

So, in summary, I recommend passive noise reduction headphones and, in particular, the EX-29 Extreme Isolation Headphones from QuietHeadphones.com

• Excellent value for the money
• 6 month, 110% money back guarantee (you don’t see that on products that don’t work)
• No batteries
• Blocks more sound than active noise reduction headphones
• No sound leaking out
• Best sound and no swooshy hiss
• Free white noise MP3 comes with your purchase!

If you work from home and have been looking for a way to find some peace and quiet, you should look into Direct Sound Extreme Isolation Headphones. If you use your headphones at your computer or with an iPod/MP3 player, you will welcome the new option to get a 40 inch cord rather than the standard 9ft cord. I sit about two feet from my computer and a 9ft cord is far more than I need. No need to twist-tie the cord anymore! The best noise canceling headphones just got better.

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Listening to my Ipod enjoy me a lot especially when I turned it out loud. I make my stress all goes out. I live in my apartment all alone. My parents is in our province. Even I wanted to turned my speaker on and turned it all out loud I can’t do it. The one living next door to me is an old lady and she don’t like noise.

One time I went out to shopping mall to buy  my food stock. I saw a 6 inch indoor outdoor loud speakers I really like it and even imagine what it feels to listen to that kind of speaker with a loud music. i asked the perosn assign to the product to test the product because I really wanted to listen to. And the louder the assistant turn it the more fun I feel and enjoy listening. So I decided to went home and the thought of the speajer can’t get out of head. I was walking upstair and I saw the person living in Attic of the building. His room is alone in the rooftop and he told me that he just vacant the place. So I headed to the office of the building and asked them that I will occupy the place.

After I transfer to a new place I immediately bought the speaker and can’t wait to test it and listen to it.