What are the lowest and highest frequencies of sound that a person with normal hearing can detect?
- Alowest frequency $2.0\ \text{Hz}$, highest frequency $2.0\ \text{kHz}$
- Blowest frequency $2.0\ \text{Hz}$, highest frequency $20\ 000\ \text{Hz}$
- Clowest frequency $20\ \text{Hz}$, highest frequency $20\ \text{kHz}$
- Dlowest frequency $20\ \text{kHz}$, highest frequency $20\ 000\ \text{kHz}$