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Next the team planned to survey residents of Taos and the surrounding communities to determine how wide spread the hum was.
Interestingly, the investigators learned that the sound was not limited to the area around Taos, but was, in fact, heard at places all over the country and around the globe.
Their survey of 1,440 residents led the team to extrapolate that roughly 2% of the Taos population were hearers.