A device providing vibration transduction and radio-frequency communication in proximity to an electrically conductive structure, the device comprising: an antenna element for transmitting or receiving a magnetic field or electromagnetic wave; an electrically conductive structure in proximity to the antenna element; and a vibration transducer comprising: a first material, the first material comprising a ferromagnetic material with piezoelectric properties; and first and second electrically conductive electrodes made of metalized material that is neither piezoelectric nor ferromagnetic, wherein the first electrode is held at a substantially constant voltage, and wherein (a) the second electrode is configured to receive electric signals to establish an electric potential between the first and second electrodes (502, 606; 504, 702) such that a portion of the vibration transducer between the first and second electrodes is subjected to mechanical stress and deformed to provide a user with a haptic or audible output notification and/or (b) the vibration transducer is configured to generate an electrical signal due to a pressure input from a user on the portion of the vibration transducer between the first and second electrodes; the vibration transducer being positioned between the antenna element and the conductive structure. an antenna element for transmitting or receiving a magnetic field or electromagnetic wave; an electrically conductive structure in proximity to the antenna element; and a vibration transducer comprising: a first material, the first material comprising a ferromagnetic material with piezoelectric properties; and first and second electrically conductive electrodes made of metalized material that is neither piezoelectric nor ferromagnetic, wherein the first electrode is held at a substantially constant voltage, and wherein (a) the second electrode is configured to receive electric signals to establish an electric potential between the first and second electrodes (502, 606; 504, 702) such that a portion of the vibration transducer between the first and second electrodes is subjected to mechanical stress and deformed to provide a user with a haptic or audible output notification and/or (b) the vibration transducer is configured to generate an electrical signal due to a pressure input from a user on the portion of the vibration transducer between the first and second electrodes; a first material, the first material comprising a ferromagnetic material with piezoelectric properties; and first and second electrically conductive electrodes made of metalized material that is neither piezoelectric nor ferromagnetic, wherein the first electrode is held at a substantially constant voltage, and wherein (a) the second electrode is configured to receive electric signals to establish an electric potential between the first and second electrodes (502, 606; 504, 702) such that a portion of the vibration transducer between the first and second electrodes is subjected to mechanical stress and deformed to provide a user with a haptic or audible output notification and/or (b) the vibration transducer is configured to generate an electrical signal due to a pressure input from a user on the portion of the vibration transducer between the first and second electrodes; the vibration transducer being positioned between the antenna element and the conductive structure. <EOS>