#mouthpiece  an acoustic device; the part of a telephone into which a person speaks
  supertype:  acoustic_device  a device for amplifying or transmitting sound
  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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