I have an alert sound of this on my phone that I have been using to test the theory. They don't notice it and everyone else does.
I have an alert sound of this on my phone that I have been using to test the theory. They don't notice it and everyone else does.
Thier voices are about an octave lower. So it makes sense that freq is not heard
Thier voices are about an octave lower. So it makes sense that freq is not heard
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