New type of sound wave boosts drug delivery. Jan 15, 2016 Making waves: Amgad Rezk has created a new type of sound A new class of sound wave that can dramatically improve the delivery of inhaled drugs and vaccines has been identified by researchers at RMIT University in Melbourne, Australia. Surface-reflected bulk waves (SRBWs) are a hybrid of bulk waves and surface waves. The team has already demonstrated that they can slash the time required to administer inhaled therapeutics throug...