title: The application of smart structures toward feedback suppression in amplified acoustic guitars.
abstract: Smart structures technology can be applied to amplified acoustic guitars to prevent instability resulting from acoustic feedback. This work presents a coupled model of the guitar dynamics and the acoustic feedback mechanism, and explains how a simple control loop using a piezoelectric ceramic actuator can be used to reduce the effects of acoustic feedback. In addition to model simulations, experimental results using a real system and a simple controller are presented. The results show that a significantly higher (7 dB) guitar output can be achieved before instability, without detrimentally affecting the amplified and unamplified guitar response.
authors.affiliation: Department of Mechanical Engineering and Material Sciences, Duke University, Box 90302, Durham, North Carolina 27708, USA.
authors.forename: Steve
authors.initials: S
authors.lastname: Griffin
authors.forename: Steven A
authors.initials: SA
authors.lastname: Lane
authors.forename: Robert L
authors.initials: RL
authors.lastname: Clark