Harmonic Overtones and Resonance

Section 2:

In Phase Odd Ordered Harmonics

The charts below show a fundamental combined with in phase odd ordered harmonics. In phase means that both tones originate with a rise in air pressure. The two tones would also be in phase if they were to both begin with a drop in air pressure.

In the charts shown here, and as is usually the case in nature, each successive harmonic is lower in amplitude than the one below it in frequency. The 3^rd harmonic is 1/3 the amplitude of the fundamental, the 5^th harmonic is 1/5 amplitude, the 7^th harmonic is 1/7 amplitude ... and so forth up the scale.

1^st, 3^rd and 5^th Harmonics

Figure 2-1

1^st, 3^rd, 5^th, and 7^th Harmonics

Figure 2-2

1^st, 3^rd, 5^th, 7^th, and 9^th Harmonics

Figure 2-3

1^st, 3^rd, 5^th, 7^th, 9^th, and 11^th Harmonics

Figure 2-4

1^st, 3^rd, 5^th, 7^th, 9^th, 11^th, and 13^th Harmonics

Figure 2-5

1^st, 3^rd, 5^th, 7^th, 9^th, 11^th, 13^th, and 15^th Harmonics

Figure 2-6