“In his own research, Barber’s large sound experiments include a “phantom road” built through the forests of Idaho. The setup replicated highway noise pollution by playing recorded traffic sounds through a series of speakers mounted on towering Douglas fir trees.
“We were building a highway — acoustically,” Barber said.
Even without the disruption of traffic or asphalt, many nearby migratory bird species struggled to put on weight or were forced to avoid the area altogether.”
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