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The Science of Headphones

Michael Marcoux
by

Natasha Marcoux

on 11 October 2012

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Transcript of The Science of Headphones

The Science of Headphones Headphones,
What are they? These days music is part of our everyday life. Many people do not go a day without listening to their favorite play list or song. How can we do this without disturbing anybody around us? The answer is headphones. Headphones allow you to listen to your favorite tunes in private. They come in many different makes, models and brands. If you want you can either purchase an in-ear or over-ear model. Headphones... where would we be without them? History of the Headphone -The headphone was first invented in the early 1930's by the German company Beyerdynamic. They had successfully invented the first dynamic headphone. "Dynamic audio devices express the range of audio sound from the loudest possible to the softest possible without distortion (Holmes 2006)." The next era of headphone began in 1958, when John C. Koss, a jazz musician created the first stereo headphone. Stereo headphones allow you to hear a "full amplitude" of sound. In 2000, the next step in privatizing music began with the inventing of the Bluetooth. The Bluetooth is more commonly used to receive calls but is also a wireless transmitter of music. Types of Headphone Dynamic Headphone
-Allows sound to range from low to high pitch without distortion. Stereo Headphone
-Allows "full amplitude" of sound. Bluetooth
-Wireless transmitter of sound. "How its Made" - Headphones Components Covered in the Video Company Logo- trademark sign used to advertise.

Mesh Cover- allows sound to pass through without rebounding back into the speaker.

Voice Coil- vibrates diaphragm causing it to emit sound.

Diaphragm- molded plastic (thick in the center, thin on the outside).

Plastic Housing- contains magnet to hold diaphragm and voice coil

Audio Wires- hold headphones over ear and deliver sound to both speakers.

Adjustable Band- allow headphones to fit on different sized heads.

Plastic Brackets- protect the speaker. How do Headphones Transmit Sound? (Revisited) Headphones transmit sound differently with every model. It can deepen base and reduce interference. But all headphones produce and transmit sound by the same basics. All headphones, have a component referred to as the voice coil. The voice coil is a copper wire, as thin as human hair, winded hundreds of times. It vibrates a plastic mold (the diaphragm) causing it to emit sound. The voice coil can be vibrated at different speeds and rates to produce sound at low and high frequencies. Conclusion In all, headphones have successfully privatized music, allowing individuals to enjoy their personal tunes. Headphones have allowed people to indulge even farther into the realm in technology. The end of the presentation has brought us back to the original question, "Headphones, where would we be without them?". Works Cited -Headphone Information

"Research Headphones." BookRags. BookRags, n.d. Web. Oct. 2012. <http://www.bookrags.com/research/headphones-woi/>.
"What Year Were Headphones Invented? Early History of Headphones." Bright Hub. N.p., n.d. Web. Oct. 2012. <http://www.brighthub.com/computing/hardware/articles/31558.aspx>.

-History of Headphones

"History of the Headphone" - RandomHistory.com. N.p., n.d. Web. Oct. 2012. <http://www.randomhistory.com/2008/08/20_headphones.html>.

-Video

"How It Made - Headphone." Www.youtube.com. YouTube, n.d. Web. Oct. 2012. < www.youtube.com>.
YouTube. YouTube, n.d. Web. Oct. 2012. <
"Discovery Channel." How It's Made. N.d. Television.

-Images

"Google." Google. N.p., n.d. Web. Oct. 2012. <https://www.google.com/search?hl=en>.
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