Ultrasound Technologies

Neurotechnology undertakes research in the field parametric sound technology. Parametric sound systems use ultrasonic waves modulated with audio signal to reproduce sound in localized regions. Neurotechnology is developing algorithms for improving sound quality of parametric sound systems.

Ultrasonic directional speakers generate ultrasonic waves that are modulated with an audio signal. As the ultrasonic waves travel through air they de-modulate and sound can be heard, however the diffraction of ultrasonic waves is much smaller than audio frequency waves, so the sound coming from an ultrasonic directional speaker is constrained to a narrow beam. Listeners feel as if the sound is generated in the air just in front of them, creating a feeling of immersion and surround sound.