Test your hearing

Low frequency:

https://www.youtube.com/watch?v=1l79-fPVgkE&list=PLZD0gzq4edIkdJ2BWnvmNJEI-jXSAGcO2

High frequency:
https://www.youtube.com/watch?v=xmKEhOS1QAo

Mine is 30-16,000 Hz.