Acoustics is the science of sound which involves the physical characteristics of music. Music moves through time. To appreciate music it is important to remember what has happened and to anticipate what is about to happen. Music is notated with a score and it is also improvised. Music is able to move the mind, heart, and body.
Musicians just use pitch or an individual tone.
Tempo is the rate of speed of the beat. Rhythm is the unique organization of the durations assigned to pitches. It can be regular, irregular, simple or complex, floating or driving etc. Folk music is primarily a vocal genre with singable melodies, regular patterns, balance, repetition, and predictability. Verse stanza and verse refrain are the most common forms.