Final answer:
The beat frequencies that will be present when different musical notes are played together.
Step-by-step explanation:
When two musical notes are played together, beat frequencies can be heard. The beat frequency is the difference between the two frequencies. To calculate the beat frequency, subtract the frequency of one note from the frequency of the other note. So, (a) When notes A (220 Hz) and C (264 Hz) are played together, the beat frequency will be 44 Hz. (b) When notes D (297 Hz) and F (352 Hz) are played together, the beat frequency will be 55 Hz. (c) When all four notes are played together, multiple beat frequencies will be present due to the combination of different frequency pairs.
Octave registers in music change between the notes G and A, meaning that after G in any octave, the subsequent note, A, would be in the next octave.
In music, an octave refers to a frequency that is either double or half of a given frequency, creating a unique interval. The octave registers in a Western musical system change between the letter names G and A. This means that after the note G in any octave, the next note would be A, but it would be in the next octave. For example, the note following G2 (G in the 2nd octave) would be A3 (A in the 3rd octave).
Learn more about Music Octaves