A whole note is held for 4 beats.
How many beats are in a whole note?
In 4/4 time a whole note gets FOUR beats; a half note gets TWO beats, and a quarter note gets ONE beat. Based on what you saw above, that 4/4 time signatures mean four beats to the measure and the quarter note gets the beat, 18.
What is the sound of a whole note?
Please note the quality of the sound of the guitar will depend on the quality of your sound card or keyboard module. This is called a WHOLE NOTE it is equal to 4 BEATS. This is called a HALF NOTE, it is equal to 2 BEATS. This is called a QUARTER NOTE, it is equal to 1 BEAT.