Abstract: A percussion instrument is adapted with a foam arrangement directly or indirectly in communication with its percussion surface. The foam arrangement reduces acoustic impact sounds when the instrument is struck, helps isolate vibrations from nearby percussion surfaces, and reduces or removes sound generation when air is released from the damper. To achieve these results, directly or indirectly secured to the percussion surface is an open-cell foam layer that is configured with a closed-cell foam layer positioned in a lateral side-by-side arrangement to create a spring and damper system. The open-cell foam may have one or more holes that extend entirely through its body, and inside those, one or more holes are closed-cell foam to provide additional spring-like functionality. The side-by-side dual-layer arrangement enables the closed- and open-cell foam layers to operate in tandem—the closed-cell layer operates as a spring, and the open-cell layer operates as a damper.

Abstract: A percussion instrument is adapted with a foam arrangement directly or indirectly in communication with its percussion surface. The foam arrangement reduces acoustic impact sounds when the instrument is struck, helps isolate vibrations from nearby percussion surfaces, and reduces or removes sound generation when air is released from the damper. To achieve these results, directly or indirectly secured to the percussion surface is an open-cell foam layer that is configured with a closed-cell foam layer positioned in a lateral side-by-side arrangement to create a spring and damper system. The open-cell foam may have one or more holes that extend entirely through its body, and inside those, one or more holes are closed-cell foam to provide additional spring-like functionality. The side-by-side dual-layer arrangement enables the closed-and open-cell foam layers to operate in tandem—the closed-cell layer operates as a spring, and the open-cell layer operates as a damper.

Abstract: The present invention relates to percussion instruments. In particular, it relates to a signal processor for detecting characteristics of vibration of a percussion pad due to a particular strike on the pad. It provides a musician more opportunity for creativity in the sound a listener a percussion instrument can hear. It provides a signal processor for a percussion instrument. The signal processor comprises a singular input signal acquiring means to acquire a singular input signal corresponding to a physical vibration of a percussion surface over time, a signal analyser to analyse the input signal for a characteristic of a strike on the surface which caused the vibration, and a command signal providing means to provide a command signal according to the characteristic.