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.

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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 »

What were the originally materials used to invent head phones?

In some countrys it is because alot of people get killed from that.

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 »

What if your nano plays both through the head phones and out loud how do you get to play through head phones only?