# Relationship between harmonics and octaves

### Fundamental frequency and harmonics

a. Octave i. An octave has to do with the frequencies of sound. Describing the Relationship Between Two Notes: Harmonics as Decimals An octave is an intervals where the frequency is twice or half the. So the third harmonic is hz isn't that the next octave? With Hz. you have all your 12 pitches in that first octave between and , right? . When you talk about the difference between "Baroque" pitch - A and.

This causes them to clash slightly. An example of this is more clearly heard when tuning two adjacent strings on a guitar. The more drastic the detune the faster the beating becomes.

Once it speeds up beyond a certain point we perceive two discreet pitches and this is the sound of harmony. But harmony can be subjective. We cannot just use the harmonic series to extrapolate definitions of harmony, for example: We hear each note as a degree of the scale, the A being major seventh of Bb, Bb being the tonic, the F is the perfect fifth and the D is the major third. If you add an even lower G into the chord, suddenly the chord now appears to be a G Now the F is the minor seventh, A is the ninth second degreethe Bb is minor third and the D is the perfect fifth.

The brings us to our next topic. There are in fact harmonics that appear in the series before some of our equally tempered intervals, in particular the 7th, 11th, 13th and 14th harmonics although 14th is just twice the frequency of the 7th.

Are these musical or dissonant, or both? Lastly we have the 13th harmonic.

### Harmonic series (music) - Wikipedia

This is closest to that of a minor sixth interval but 41 cents sharp. It turns out the cosmologists like to claim this one too, but there we go. Should we make inclusions for these in our music?

Broadly speaking — no. Here's a video demonstrating both resonant response and beat frequency.

What's happening is that the effects of the wave in air literally add up. Sometimes, when both wave peaks and troughs line up, they produce a louder sound.

• Self-study exercise: Partial tones