Keyboard music instrument for the amount of play and for finger exercises on the keyboard without acoustic sounds

摘要

The keyboard has a number of keys 1a,1b that are coupled to a mechanism 2 consisting of hammer elements 3. The mechanism moves through an arc when a specific key is actuated. Each hammer head 3 is of metal or synthetic material, and strikes a fixed anvil 4. Coupled to the anvil is a piezo electronic sensor 7a that provides a proportional input signal to a signal generator 7b. This generates output to a loud speaker 7c or headphones 7d. The key mechanism has a load mechanism 5 that allows the action to be damped.