Researchers have made a breakthrough in audio technology, developing a system capable of remotely transferring sound over short distances—around one meter—while maintaining a volume equivalent to normal speaking levels (about 60 decibels). This innovation, while still in its early stages, has the potential to revolutionize how we experience sound in shared environments, offering a solution to the age-old problem of private listening without disturbing others.

Currently, the system uses high-intensity ultrasound to transmit sound, but the process has a few limitations. The high-intensity ultrasound is necessary to generate the moderate audio levels due to conversion inefficiencies, though the team emphasized that the sound levels used fall well within established safety guidelines. With further refinement, the researchers believe they can increase both the distance and the volume of the audio transmission by adjusting the ultrasound intensity.

Another hurdle the team faces is maintaining audio quality. The current technology causes some distortion in the sound, which could be problematic for complex audio content such as music or intricate speech. However, the researchers are optimistic that advanced signal processing techniques could be used to mitigate these effects in future versions, improving overall clarity and fidelity.

The concept of “audible enclaves”—isolated pockets of sound that are confined to specific areas—holds tremendous promise. This targeted audio technology could change the way we experience sound in public or shared spaces, enabling private listening without creating isolation. By focusing sound with laser-like precision, it would allow people to enjoy their music, podcasts, or calls without disturbing others nearby.

As the technology develops, it could have wide-reaching applications, from personal audio devices to public environments like libraries, airports, or even open-plan offices, where private listening could be achieved seamlessly. This development marks an exciting step forward in rethinking how we use sound in our everyday lives.

By Impact Lab