Complex sentence: Spoken/a/'s F2 and whistled/a/'s H1 match in their frequency (1480Hz), and while spoken speech has a wide range of F2 frequencies (790Hz to 2300Hz), whistles are limited to 1200Hz to 2400Hz.
Split into simpler sentences: Spoken/a/'s F2 and whistled/a/'s H1 match in their frequency (1480Hz). Spoken speech has a wide range of F2 frequencies (790Hz to 2300Hz), whistles are limited to 1200Hz to 2400Hz.