| A lot of people have heard of noise canceling | | | | These kinds of noise canceling headphones have, |
| earphones, but they do not really know what they do | | | | pretty much, three benefits. They have these benefits, |
| or why people made them in the first place. When you | | | | because they use a very low frequency to keep out |
| think about it, people do not know if they cancel noise | | | | some portions of the noise, while using other methods, |
| from coming in while you are listening to your music or | | | | like ear cups, to keep out the other positions of the |
| if it stops people from being able to hear your music | | | | noise. The benefits of this is that the demand in such a |
| while you are listening to your earphones. Today we | | | | product of a high electronic circuitry is greatly reduced. |
| are going to go into more detail about what these kind | | | | Not only that, but because of the shorter wavelengths |
| of earphones really are and if they are worth getting. | | | | of the high frequency sound, to cancel all of the |
| We all know that they are in high demand right now, | | | | wavelengths that are coming to the ear, you would |
| but are they worth it? | | | | have to have a waveform that would actually be |
| First of all, the noise canceling headphones reduce | | | | adjacent to the eardrum. This, of course, is a very |
| what is called unwanted ambient sounds. This is what | | | | impractical situation. Last, but not least, it also has an |
| some people would also call acoustic noise. They do | | | | effective passive isolation from rising frequency. So |
| this by way of ANC. To put in other terms, they do | | | | what does all that mean? It means that you are able |
| this by active noise control. So how does this ANC | | | | to enjoy your music at a reasonable level without |
| work? Well, pretty much, this is done by placing a | | | | making other people have to listen to it as well. |
| microphone near the ear and then using electronic | | | | These kinds of headphones are everywhere |
| circuitry to generate what people call an anti-noise | | | | now-a-days. You can find them for top dollar prices, |
| sound wave. The opposite polarity of the sound wave | | | | and you can find them at lower prices. The point being, |
| that is made arrives at the microphone. Pretty much, | | | | no matter what price you get them at, you are getting |
| what this results in is a destructive interference (what | | | | the same kind of technology. Most people did not |
| gives you your noise canceling ability). In turn, it actually | | | | know that all of that work and technology went into |
| cancels out the noise within the enclosed headphone. In | | | | make these kinds of earphones. People use to think |
| a nut shell, you are able to enjoy your music without | | | | that the ear cups did all of the cancellation of the noise, |
| having to increase the volume up very loud or, as | | | | but really, there are more things at work than you |
| some may call, unnecessarily. People who are riding | | | | know. |
| around you will not be able to hear the music at all. | | | | |