E-Mail IMAGE: Scientists Matt Eichenfield, left, and Lisa Hackett led the team at Sandia National Laboratories that created the world's smallest and best acoustic amplifier. view more Credit: Bret Latter, Sandia National Laboratories ALBUQUERQUE, N.M. -- Scientists at Sandia National Laboratories have built the world's smallest and best acoustic amplifier. And they did it using a concept that was all but abandoned for almost 50 years. According to a paper published May 13 in Nature Communications, the device is more than 10 times more effective than the earlier versions. The desig...