As the Kiss-terns

The interns at Kiss 98.5 are taking over!


Entry 1

I am from Lockport, New York born and raised.  I have one year left of college at SUNY Fredonia. The last three years of my life have been focused doing radio related business as part of Fredonia Radio Systems. I was honored at the Intercollegiate Broadcast Systems National Conference, earning "Most Creative Show" for the Fredonia morning show with Jud Heussler.
Technology has always been an interest of mine. As a kid I used to break open speakers and radios to figure out how things work. As much as I messed things up—I also learned a lot about circuits and electricity (due to shocking myself a million times).  My blog is going to feature a different piece of technology every week to explain how it works.
This week I will explain how a simple speaker works:


A speaker has a form of a magnet inside it to convert an electrical message, (CDs, mp3, cassette, etc.) to sound. This magnet is part of the “driver” and is made up of wire that is spun into a coil. The wire is coiled similarly to guitar strings or springs, but is much thinner, with each rotation very close to the last. The coil pushes back and forth from an electrical charge given by the source like an iPod for example. 
On the diagram above, the magnet is the yellow lines. So an electrical current runs through the coil and moves back and forth along a small object called a “pole piece.”
The sound is focused and projected outward from a cone which is typically seen when looking at a speaker.  These cones can also be designed to send out specific frequencies. Small compact cones send out higher frequencies, where deeper wider cones send out lower frequencies.
Obviously headphones (ear buds and over ear) have small parts, especially small cones to generate sound. This does not mean that only high frequencies will be heard. In fact a human ear can hear most of the frequencies in a song with small headphones because the sound is traveling a very short distance compared to how stereo or computer speakers work.  With less space, the headphone needs less energy to work. Large speakers are really only needed to make things louder, like in bigger structures like a whole room, a car, or outside.
Try it yourself, turn your headphones up to half volume and try to pick out the highs, mids and low sounds in a song. Then move the headphones away from your ear and notice the lower sounds disappear, leaving just the higher ones.


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Locations : LockportNew York
People : Jud Heussler




 
06/25/2013 1:33PM
Entry 1
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