Energy is a vibration.
Starting at a frequency of 1Hz we begin in the infrasonic sange. This is the sub-audible, "audio" range. Next is the acual audible range of sound, about 10Hz to 10Mhz. Most people and animals hear less than that, but let's give our fellow mammals the benefit of the doubt. Then begins the ultra sonic range. The first vibrations to high for humans to hear. Some of that wil certainly irritate your dog though. That is about 10Mhz to 100 Khz.
Then begins radio. AM radio specificly.
AM runs 535 Khz to 1705Khz, actually sharing the last 100 with radio-location
FM runs 88 Mhz to 108 Mhz.