About the system - errors of the acoustical ring-type resonator

Abstract

An acoustical ring-like resonator was investigated, for example, a piece of pipe with or without sediments. It was assumed that the resonator consists of many concentrical cylinders, resonating separately. The resonance characteristic in such case is a superposition of the resonances of all cylinders. Increasing their number or the difference of frequency the characteristic becames smaller and broader. That is the source of the errors discussed there.