EntityQ5191407· pop 5· linked from 4 articlescrystal earpieceSign in to savepiezoelectric earphone, producing sound by using a piezoelectric crystalConnectionspiezoelectricityEntityelectricityEntitymetalEntitysoundEntityatmosphere of EarthEntitymicrophoneEntityquartzEntityloudspeakerEntityadhesiveEntityresonanceEntityimpedanceEntityheadphoneEntityeardrumEntityhearing aidEntityelectronic amplifierEntitycrystal radioEntityPotassium sodium L-tartrate tetrahydrateEntitytransistor radioEntityaudio signalEntitymonoauralEntityCategoriesAudio electronicsHeadphones