Headphones were based off the earpiece and were the only way to listen to electrical audio signals before amplifiers were developed. They were first successfully developed in 1910 by Nathaniel Baldwin. He made them in his kitchen and sold them to the Navy.
Headphones were invented to help people listen to music without other people hearing the music or whatever and its Jeff again <>,...,<> this is the right answer so don't change !!! need more info message me at Jeffybo@aim.com im not a computer <>,...,<>
music got so loud, popped everyones ears, and made it hard to sleep
Because you're friends families etc. can't hear what you here
sometimes it is bad in your ear because it can make you deaf
or something sorry for my spelling.
The decendants of the incas still do exist today.
The incas don't exist today
Yes it does exist today, but it did not exist until the 1920's.
yes iis still exist
Slavery did exist in 2004 and still exists today.
Olympia, Greece does not exist today.
No it does not
does the caddo tribe still exist today
Yes famine still exist in many parts of the world.
It has not been proven for vampires to have ever existed. However, it is possible that they have existed and may still exist today.
Yes, it does...
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