This article presents a review of air-coupled ultrasonics employed in the characterization or
nondestructive inspection of industrial materials. Developments in air-coupled transduction …

Air-coupled ultrasonic (ACU) is a contactless ultrasonic measurement method which has
become increasingly popular for material characterization. This is due to a growing number …

Hidden, sub-surface paint layers and features contain valuable information for the art-
historical investigation of a painting's past and for its conservation for coming generations …

This paper describes a non-contact method to characterize isotropic and anisotropic planar
multilayer structures using a genetic algorithm. The method is based on the determination of …

Glued timber products are widely used in construction; therefore, it is necessary to develop
non-destructive bonding quality assessment methods for long-term structural health …

Abstract What are Cy Twombly's sculptures made of? This article presents an overview of a
non-destructive examination conducted on three sculptures by American artist Cy Twombly …

Contact‐type ultrasonic test is commonly used in construction industry where gel‐couplant is
applied to the material being tested and the transducers to assure that wave propagation will …

The main goal of this work was the non-destructive testing (NDT) of an ancient fresco (15th
century) preserved in the Santa Maria di Collemaggio Church (L'Aquila, Italy) and damaged …

The increasing deterioration of panel paintings can be due to the physical processes that
take place during exhibition or transit, or as a result of temperature and humidity fluctuations …

The capability of air‐coupled transducers to send and receive ultrasonic signals to and from
the air opens up the use of ultrasonic methods to characterize materials, test components or …