This remote Bolivian tribe does not hear pitch the same way most people do:
Here’s a scenario you might be familiar with. You’re at a birthday party, and the crowd starts to sing Happy Birthday — but it starts much too high or too low for you to comfortably sing along. One way around this, to keep the group in tune, is to sing along an octave above or below the rest.
Could people who have had no exposure to Western music recognize the connection between two notes an octave apart? That’s the question that researchers from MIT and the Max Planck Institute for Empirical Aesthetics in GermanyEduardo Undurraga, an assistant professor at the Pontifical Catholic University of Chile, runs a musical pitch perception experiment with a member of the Tsimane' tribe of the Bolivian rainforest.in a remote area of the Bolivian rainforest.
The researchers played certain notes of different frequencies and asked the Tsimane' to match this to the same note in a different octave. One of the tasks they got was to sing back an interval an octave lower, for example. Whereas people who have been exposed to octave-based music could do this quite easily, it was much harder for the Tsimane'.
Studies like this are difficult to do, not only because there are so few isolated groups, but because the act of interacting with the tribes on these visits is in itself part of them interacting with Western culture. You’ve got to wonder what the Tsimane' thought of this experiment, where they had to listen to strange tones. But now that they did, they’ve been exposed to more octave intervals than ever before.
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