Human fetuses can begin to hear at around 20 weeks of gestation, but only low-frequency sounds penetrate the muffled environment of the womb. A new study suggests that this is a feature, not a bug.
Using simple computer models of human auditory processing, professor of vision and computational neuroscience Pawan Sinha, SM ’92, PhD ’95, and colleagues showed that performance on tasks such as identifying emotions from a voice clip was better when the input the model received while learning the task was initially limited to these low frequencies.
Along with a previous study by the same team, which showed that early exposure to blurry images of faces improves computer models’ subsequent performance in face recognition, the findings suggest that initially receiving low-quality sensory input may be key to some aspects of brain development, especially when it comes to absorbing information over larger areas or longer periods of time.
“Instead of thinking of the poor quality of the input as a limitation that biology is imposing on us, this work takes the standpoint that perhaps nature is being clever and giving us the right kind of impetus to develop the mechanisms that later prove to be very beneficial when we are asked to deal with challenging recognition tasks,” Sinha says.
In practical terms, the new findings suggest that babies born prematurely may benefit from being exposed to lower-frequency sounds rather than the full spectrum that they now hear in neonatal intensive care units, the researchers say.
This artist is dominating AI-generated art. And he’s not happy about it.
Greg Rutkowski is a more popular prompt than Picasso.
VR is as good as psychedelics at helping people reach transcendence
On key metrics, a VR experience elicited a response indistinguishable from subjects who took medium doses of LSD or magic mushrooms.
This nanoparticle could be the key to a universal covid vaccine
Ending the covid pandemic might well require a vaccine that protects against any new strains. Researchers may have found a strategy that will work.
How do strong muscles keep your brain healthy?
There’s a robust molecular language being spoken between your muscles and your brain.
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.