Double resonance chamber for helicon-bass notes of piano accordions - has extra two part resonance chamber in addition to normal chamber

摘要

A double resonance chamber for use in the helicon-bars section of piano accordions has a second resonance chamber composed of two halves which can be separated from each other to allow access to the helicon bars vibrators (HB). The air channels of the second resonance chamber are arranged at angles to each other, and not as in the primary resonance chamber one on top of another. If the whole resonance chamber system is of approx. 30 cm height the bars vibrators for all 12 note types may be incorporated.