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The First Headphones
The first headphones were invented by Nathaniel Baldwin in his kitchen. US Navy placed an order for 100 units and called them “Baldy Phones”.
http://www.upi.com/Technology/2014/09/15/The-Evolution-of-the-Headphone/2731410794182/ -
Birth of the Stereophone
The introduction of the Koss SP3 headphones by John C Koss, which were the first stereo headphones created specifically for using when listening to music. Designed for new-fangled stereo LPs at home
http://www.upi.com/Technology/2014/09/15/The-Evolution-of-the-Headphone/2731410794182/ -
The First Electrostatic Headphones
The Koss ESP/6 were the first electrostatic headphones. It provided less distortion and lower weight.
http://silentdis.co/2012/03/history-of-headphones/ -
Music Goes Mobile
Sony came out with the Walkman, which made music mobile. Lighter headphones were needed, so Walkman came bundled with the MDR-3L2, which were almost a tenth of the weight of other headphones available at the time.
http://www.upi.com/Technology/2014/09/15/The-Evolution-of-the-Headphone/2731410794182/ -
Transition to Canal Earphones
Earbuds that could fit further into the ear canal were created, which gives better isolation at a lower volume.
http://silentdis.co/2012/03/history-of-headphones/ -
Invent of Wirless Headphones
Wirless headphones using Bluetooth technology came out. This created a new market and suggested a new way of evolution.
http://content.time.com/time/specials/packages/article/0,28804,1934259_1934277_1934517,00.html
