Why is mo­bile phone sound poor?

Science Illustrated - - ASK US -

A phone con­ver­sa­tion is cut into bits and pieces that are com­pressed and in­for­ma­tion dis­carded. Or at least, it used to be un­til the in­ven­tion of phones that have a "Voice over LTE" func­tion. This uses the 4G net­work for very high voice qual­ity, much bet­ter than you might ex­pect!

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