News tagged with microphone

Protecting your smartphone from voice impersonators

It's a lot easier to talk to a smartphone than to try to type instructions on its keyboard. This is particularly true when a person is trying to log in to a device or a system: Few people would choose to type a long, complex ...

dateJul 19, 2017 in Security
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Graphene sheets enable ultrasound transmitters

University of California, Berkeley, physicists have used graphene to build lightweight ultrasonic loudspeakers and microphones, enabling people to mimic bats or dolphins' ability to use sound to communicate and gauge the ...

dateJul 07, 2015 in Nanomaterials
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