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  "text_head": "Jump to content\nMain menu\nMain menu\nmove to sidebar hide\nNavigation\nMain page\nContents\nCurrent events\nRandom article\nAbout Wikipedia\nContact us\nContribute\nHelp\nLearn to edit\nCommunity portal\nRecent changes\nUpload file\nSpecial pages\nSearch\nSearch\nAppearance\nDonate\nCreate account\nLog in\nPersonal tools\nDonate\nCreate account\nLog in\nContents\nmove to sidebar hide\n(Top)\n1 History\n2 Applications\nToggle Applications subsection\n2.1 Applications for audiometric testing\n3 Electrical characteristics\nToggle Electrical characteristics subsection\n3.1 Impedance\n3.2 Sensitivity\n4 Specifications\nToggle Specifications subsection\n4.1 Ear adaption\n4.1.1 Circumaural\n4.1.2 Supra-aural\n4.1.3 Ear-fitting headphones\n4.1.3.1 Earphones\n4.1.3.2 In-ear headphones\n4.2 Open- or closed-back\n4.3 Headset\n4.3.1 Telephone headsets\n4.3.2 Communication headsets\n5 Ambient noise reduction\nToggle Ambient noise reduction subsection\n5.1 Connectivity\n5.1.1 Wired\n5.1.2 Wireless\n6 Transducer technology\nToggle Transducer technology subsection\n6.1 Moving-coil\n6.2 MEMS\n6.3 Electrostatic\n6.4 Electret\n6.5 Planar magnetic\n6.6 Balanced armature\n6.7 Thermoacoustic technology\n6.8 Other transducer technologies\n7 Benefits and limitations\n8",
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