![]() ![]() Twenty Thousand Hertz is produced out of the studios of Defacto Sound, and hosted by D allas Taylor.īecome a monthly contributor at 20k.org/donate. June 3rd (No oohs and ahhs) by Virgil Arles I'm Not Here (Instrumental) by Graphite Man Diana Deutsch and neuroscientist Dana Boebinger explain why our hearing is a unique sense and why sonic illusions can fool us. Sonic illusions put a spotlight on the unique function of our hearing and how our backgrounds and biology affect how we process sound. Sometimes our ears can even play tricks on us. What we hear is incredibly personal and we all hear things differently. PNAS 120 (29): e2301463120 doi: 10.1073/pnas.This episode was written and produced by Carolyn McCulley. The study was published in the Proceedings of the National Academy of Sciences. “We also plan to investigate visual disappearances and other examples of things people can perceive as being absent.” “We plan to keep exploring the extent to which people hear silence, including whether we hear silences that are not preceded by sound,” the scientists said. ![]() The findings establish a new way to study the perception of absence. “The kinds of illusions and effects that look like they are unique to the auditory processing of a sound, we also get them with silences, suggesting we really do hear absences of sound too.” “There’s at least one thing that we hear that isn’t a sound, and that’s the silence that happens when sounds go away,” said Johns Hopkins University’s Professor Ian Phillips. It was that the same illusions that scientists thought could only be triggered with sounds worked just as well when the sounds were replaced by silences. The idea wasn’t simply that these silences made people experience illusions. They then listened for periods within those audio tracks when all sound stopped abruptly, creating brief silences. The participants were asked to listen to soundscapes that simulated the din of busy restaurants, markets, and train stations. ![]() ![]() Other silence illusions yielded the same outcomes as sound illusions. They found the same results: people thought one long moment of silence was longer than two short moments of silence. In tests involving 1,000 participants, the study authors swapped the sounds in the one-is-more illusion with moments of silence, re-working the auditory illusion into what they dubbed the one-silence-is-more illusion. One example is known as the one-is-more illusion, where one long beep seems longer than two short consecutive beeps even when the two sequences are equally long. Like optical illusions that trick what people see, auditory illusions can make people hear periods of time as being longer or shorter than they actually are. “If you can get the same illusions with silences as you get with sounds, then that may be evidence that we literally hear silence after all.” “Our approach was to ask whether our brains treat silences the way they treat sounds.” Chaz Firestone, a researcher at Johns Hopkins University. “Philosophers have long debated whether silence is something we can literally perceive, but there hasn’t been a scientific study aimed directly at this question,” said Dr. “Surprisingly, what our work suggests is that nothing is also something you can hear.” “But silence, whatever it is, is not a sound - it’s the absence of sound.” “We typically think of our sense of hearing as being concerned with sounds,” said Rui Zhe Goh, a graduate student at Johns Hopkins University. show that silences can substitute for sounds in three prominent auditory illusions caused by event representation. ![]()
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