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The way in which we to music and hear sounds has over the centuries. Today, we have state-of-the-art, noise-cancelling ear buds that the highest quality aural experience. In the near future, we will able to listen to music in public without headphones. New technology is tested that can beams of sound at individuals, without people next to them . This means we could be having private conversations in public without others listening in. A team of researchers at Penn State University in the USA an innovation called "audio enclaves". The ultrasound waves used for these enclaves cannot be en route to the recipient. In addition, the waves can be to get around obstacles.

The researchers to the website "The Conversation" about their work. Lead researcher Jiaxin Zhong said: "We essentially a virtual headset. Someone within an audible enclave can hear something only for them, enabling sound and quiet zones." He on the potential uses of the technology. Museums could provide headphone-free audio guides to visitors. Passengers in a car could listen to music without the driver. Those requiring confidentiality could up enclaves to their conversations are not overheard. Individuals could also personalized ads as they walk through a shopping mall. In addition, audio enclaves could set up to noise pollution in busy workplaces.