![]() (If you want to download the mp3 of the demo, right-click this link and choose "save as"). Some people think the garbled recording says. ![]() A few seconds into the sound example, the noise will have become loud enough to cover up ("mask") the gaps in the beeps, so that the beeps are heard as a continuous tone. We can actually hear silence, concludes a team of philosophers and psychologists who used auditory illusions to reveal how moments of silence distort people’s perception of time. The Illusion: Twitter users bored with the Yanny/Laurel question have been sharing this equally divisive clip. The noise pulses have been arranged so that they fall in the gaps between the beeps. ![]() These beeps continue unaltered throughout the sound example, but as the beeping continues, a pulsed noise slowly grows and then fades in amplitude. Short pure tone "beeps" occur repeatedly at short, regular intervals. The audio example below illustrates a similar effect in hearing. However, most people would see the blue line as continuous, assuming that it continues behind the green boxes. The red line, however, is obviously broken in two as you can see the gap. A visual example is shown in in the graphic here. ![]() The "Law of Continuity", one of the "Gestalt rules" thought to govern perception, stipulates that our mind will tend to interpolate or extrapolate perceptual "objects" if the edges of the objects are obscured. In the present study, we employed an auditory signal detection task to induce auditory illusions in a sample of healthy subjects. ![]()
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