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 cresWHAT IS INTENSITY?

Intensity or Loudness is the quality that lets you know how SOFT or LOUD the note sounds.


IN PHYSICS it depends on the AMPLITUDE of the vibrations.
Soft sound: small amplitude of vibrations
soft
Loud sound: big amplitude of vibrations
loud
Its measure is the DECIBEL (dB)

IN MUSIC we need Italian words (piano, forte, crescendo, decrescendo...) for
DYNAMICS MARKING

p   f
    cres                                                                                                                                                            

With the combination of different dynamics music is more EXPRESSIVE