The Science Behind Your Phone's Voice

Your phone is lying to you because that voice you hear is actually just chopped-up math.

It’s called PCM, and it literally slices your analog sound waves into binary code thousands

of times a second. It uses the Nyquist rule to make sure it doesn't sound like a robot,

then packs it into 8-bit chunks. But to actually travel, that data has to

surf on a carrier wave using modulation. It’s all organized by the OSI model, which is basically

a seven-layer dip of internet protocols wrapping your message from an app down to a physical spark.