Stereo: Meaning sound can be heard from both channels (left and right sides) of earphones.
Channel: piece of equipment that can be put into or on top of the ear so that sound can be heard from a device.
Track: A track is a song/songs on an album
Frequency: Frequency is measured of occurrences of a repeating event per unit time
Hertz: the unit of frequencyDecibel
Decibel: the intensity of sound
Wav, mp3, aiff: audio/video formats
