The precise calibration of acoustic particle velocity sensors in pressure-velocity (p-v) probes is still a great challenge and not fully solved, since no standardized reference sensor exists. Current available techniques does not allow for simultaneous calibration of all three components of the particle velocity sensor. Furthermore, most of the available calibration procedures require anechoic ...

Acoustical-based imaging techniques have found merit in determining the behavior of vibrating structures. These techniques are commonly used in numerous applications to obtain detailed noise source information and energy distributions on source surfaces. Source reconstructions using near-field acoustical holography NAH are reliant upon accurate measurement of the pressure field at the hologram ...

Complex systems involving many interacting components being out of equilibrium often organize into patterns. Understanding the underlying principles that govern such systems might lead to a deeper insight into living systems and the development of new applications in robotics. In this contribution, we investigate water-based self-assembling modules, exhibiting a segregation effect under some pa...

Mautly Pathfinder is a system designed to obtain images of the surrounding world presented to a blind person by any video camera and to manage those images to obtain only the significant information for the user such as the shape, size, position and relative movements of possible hazards. This information is transmitted to the user by a vibrating matrix located on the abdominal region of the bo...

Arthropod filiform hairs respond to air particle movements and are among the most sensitive animal sensory organs. In many species, they are tuned to detect predators or prey and trigger escape or prey capture behaviours. Here we show for the first time that these hairs also receive intraspecific near-field sound signals in an arachnid. During agonistic encounters, whip spiders (Arachnida, Ambl...