Treble refers to tones whose frequency or range is at the higher end of human hearing. In music this corresponds to "high notes". The treble clef is often used to notate such notes. Examples of treble sounds are soprano voices, flute tones, piccolos, etc.
In general, bass is the low-frequency sounds that make up music commonly used as rhythm and treble are the high-frequency sounds that usually make up the more dominant parts. Bass and treble clefs are symbols used to show whether the notes fall in the upper end or the lower end of the music spectrum.
ibuds: no bass 'better headphone:' omg it has bass! this must mean it's. 6 and 8s the bass is beautiful when compared to many other iems.
Use this information if you are getting too much or too little bass or treble from your system.