Forming a head on a beverage using ultrasound

摘要

A method and apparatus of forming a head on a beverage using ultrasonic energy, the apparatus 10 including an hydrating means 13 such that a layer of water is provided to keep a platform 19 , which is in turn coupled to an ultrasonic transducer 14 , maintained in conductive contact with the base B of a glass G of beverage. The water layer improves the transfer of ultrasonic energy to the beverage in the glass. Preferably the method and apparatus also features a control means to provide a range of ultrasonic frequencies to the ultrasonic transducer to take into account variations in glass base thickness that otherwise makes energy transfer inconsistent.