Keyboard having capacitance-sensitive key fields

A keyboard, comprising:

• a plurality of key fields;
• a plurality of capacitive elements, wherein each capacitive element is associated with a key field and wherein each capacitive element is designed to change its capacitance value when actuating the key field associated with said element;
• measuring electronics which are configured to measure the capacitance value of each of the capacitive elements;
• wherein the measuring electronics are configured to detect a change of the capacitance value of one of the capacitive elements between a non-actuation level lying in a first capacitance value range and an actuation level lying in a second capacitance value range and then output an actuation signal in response thereto;
• wherein the measuring electronics are further configured to detect a change of the capacitance value of the one capacitive element between the non-actuation level lying in the first capacitance value range and a manipulation level lying above the second capacitance value range and then output an alarm signal in response thereto.