Operator feedback

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In computer keyboards, operator feedback provides the operator with one or more indications that keystrokes have been registered.

Audible feedback

Audible feedback uses sound to indicate successful detection of keystrokes. The most common form of audible feedback is that of a click mechanism inside each keyswitch. When the key actuates, a click sound is generated within the switch.

Alternatively, a device external to the switches can be provided. The most common choices are that of a buzzer or loudspeaker, and of a solenoid. In the case of solenoids, the solenoid is not used for its original electromechanical purpose, but simply as a way to generate a short, distinct sound. The Zenith ZKB-2 is an example of a keyboard that uses a buzzer, while solenoids can be found in some IBM Beam Spring Keyboards.

Tactile feedback

A tactile keyboard is one in which the operator is able to feel when keystrokes have registered.