1. Calculate the second resonant frequency of a closed-open tube for a speaker with a vocal tract length of 15cm (assume the speed of sound is 34,400 cm/s).

Group of answer choices

1720 Hz

573 Hz

2867 Hz

934 Hz

2. Calculate the third resonant frequency of a closed-open tube for a speaker with a vocal tract length of 10cm (assume the speed of sound is 34,400 cm/s).

Group of answer choices

860 Hz

573 Hz

4300 Hz

2850 Hz