Headphones for transceived devices
{
headphones to listen to radio amasounds Heilsound, Kenwood and Yaesu. {
le & nbsp; { headphones & nbsp; { are devices capable of listening to a single listener the audio source, & nbsp; to which they are connected. Invented in 1910 by Nathaniel Baldwin, this device can be Monocassa or Bicassa: in the latter case allows stereophonic listening and on each case the letter L (Left, left) or R (right, right) is impressed, to indicate the ear to which it must be applied. {