Researchers design sounds that can be recorded by microphones but inaudible to humans
Monday, June 26, 2017 - 11:02
in Mathematics & Economics
Researchers have designed a sound that is completely inaudible to humans (40 kHz or above) yet is audible to any microphone. The sound combines multiple tones that, when interacting with the microphone's mechanics, create what researchers call a 'shadow,' which is a sound that the microphones can detect.