Question

 When did John C. Koss invent the in ear head phones?

Answer mobile phone is more harmful bcoz the waves that comes from it can cause heart diseases,memory loss,sleep disorders etc.
http://wiki.answers.com/Q/When_did_John_C._Koss_invent_the_in_ear_head_phones

Top Q&A For: When did John C. Koss invent the in ear head ph...

When did John C Koss invent the ear buds?

prior to the just released 4th generation iPod touch, there was no built in mic so anyone wanting to use voip phone apps and audio recording/editing apps were unable. the iPhone never needed one an... Read More »
http://wiki.answers.com/Q/When_did_John_C_Koss_invent_the_ear_buds

Why are head-phones called head-phones when they are not exactly head PHONES?

well if you talking about the phone parts it because they look like phones and you put them in a ipod or a computer so then it like talks to ya :) i have 1000 head phones
http://wiki.answers.com/Q/Why_are_head-phones_called_head-phones_when_they_are_not_exac...

Why did Nathaniel Baldawin invent the head phones?

The most important first step in the process is to carefully set the camera down on a flat surface, pick up the instruction/operation booklet that came with it, and read the booklet. There's all ... Read More »
http://wiki.answers.com/Q/Why_did_Nathaniel_Baldawin_invent_the_head_phones

What were the originally materials used to invent head phones?

In some countrys it is because alot of people get killed from that.
http://wiki.answers.com/Q/What_were_the_originally_materials_used_to_invent_head_phones


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