THECONFIDENTIALFREQUENCIES
000 Hz.[4], and plasmas. The matter that supports the sound is called the medium. Sound cannot travel through a vacuum. The audible frequency range for humans is typically given as being between about 20 Hz and 2, liquids, solids, some dog breeds can perceive vibrations up to 60, Sound is made up of changes in air pressure in the form of waves. Frequency is the property of sound that most determines pitch.[3] The frequencies an ear can hear are limited to a specific range of f