Nondestructive Acoustical Method for the Needs of the Assessment of Decay in Trees

A nondestructive method for the assessment of decay in trees is an important and challenging research topic to monitor the risk they pose to people, cars, buildings, etc. Many reported approaches seem to be either too expensive, too bulky to be of any use in practice or rather semi-invasive. In this paper we propose an objective version of the standard primary method based on striking the tree and listening for the way the tree sounds