Complex sentence: Conventional audiometry tests frequencies between 250 hertz (Hz) and 8 kHz, whereas high frequency audiometry tests in the region of 8 kHz-20 kHz.
Split into simpler sentences: Conventional audiometry tests frequencies lie in between 250 hertz (Hz) and 8 kHz. Whereas, high frequency audiometry tests in the region of 8 kHz-20 kHz.