fast speed high frequency large amplitude long wavelength
I gave my students this multiple choice question: The human hearing range is 20-20,000 hertz. A sound Peggy heard was measured at 15,000 hertz. Which characteristic best describes the sound wave that Peggy heard?

Only one answer is correct among these 4 choices:
- fast speed
- high frequency
- large amplitude
- long wavelength

Could you tell me which one is correct?

high frequency