The present disclosure relates to systems and methods for low-power, data transmission using ultrasound signals. In one implementation, a data transmission system includes an ultrasound transducer configured to generate ultrasound signals in response to power supplied from a power source, and a mechanical ultrasound amplifier coupled to the ultrasound transducer, the ultrasound amplifier having a substrate adapted to function as a soundboard to amplify the ultrasound signals. The range of the data transmission system may be increased with a relay system. The relay system may include one or more detectors and one or more repeaters.
