US Patent 8035025 Acoustic musical instrument with transducers

A stringed musical instrument may include various features, including any of a soundboard designed for efficient production of acoustic tone, a removable cover for easy access to the instrument's interior, a tailpiece mounted to receive and tension strings, one or more transducers to record and amplify musical tones, a dampening device that further improves operation of the transducers, a detachable thumbrest, an overbrace to strengthen supporting cross members that embody openings, and a rigid overlay that may be placed over an original fretted fingerboard to create a fretless surface for the strings to contact.