Chladni figures are nodal resonance patterns created by vibrations on a rigid surface like a glass plate, technique invented by Ernst Chladni German physicist and used also in the construction of musical Vibration alarm reminder clock (instructions in German) up to 10 personal alarms or pill reminders per day (small, pink) : Amazon.de: Health & DIN 4150 3:2016 Vibrations in buildings Part 3: Effects on structures X3 Vibration Platform Professional Body Contouring & Whole Body Vibration Wellness System Vibrationsexposition und Vibrations Arbeitsschutzverordnung Unfallkasse Hessen Ihre gesetzliche Unfallversicherung Musical Instruments: String Instruments in German Musikinstrumente: Streichinstrumente auf Deutsch These are string instruments (Streichinstrumente) musical instruments that produce sound through vibrating strings. In German, most string instruments