The ultrasonic washing is based on high-frequency sound vibrations, which cause strong cavitation in liquid. Microscopic cavitation bubbles implode on...

Sprinkling water is poured on the hearth helps to concentrate the flame and prevents it from spreading too much. Sound : water is sprinckled on the...

Wood chisel to cut the ends of the bottom of the dam. Sebastian has been working as a luthier for the past 13 years. He creates guitars and specialises...