How we listen to music is changing. Today, we have high-tech ear buds that give a top quality sound. In the future, we will be able to listen to music in public without headphones. New technology will aim beams of sound at us, without others hearing. We will have conversations in public without other people listening in. Researchers developed an innovation called "audio enclaves". The sound waves used for this cannot be heard on their way to the receiver.

The lead researcher said: "Someone within an audible enclave can hear something meant only for them, enabling…quiet zones." He spoke about possible uses of the technology. Museums could give headphone-free audio guides to visitors. People could set up an enclave to make sure their conversations are not overheard. We could also receive personalized ads in shopping malls. Audio enclaves could also reduce noise in busy places.