#telephone_receiver__telephonereceiver__receiver  earphone that converts electrical signals into sounds
  supertype:  #earphone__earpiece__headphone__phone  electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear; "it was not the typing but the earphones that she disliked"
  subtype:  #headset  receiver consisting of a pair of headphones
  part of:  #telephone_set__telephoneset__telephone  electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds; "I talked to him on the telephone"
     part of:  #telephone_system__telephonesystem__phone_system__phonesystem  a communication system that transmits sound between distant points

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