The City Harmonic was created in 2006.
Spherical Harmonic was created in 2001-12.
Oxford Harmonic Society was created in 1921.
Nottingham Harmonic Society was created in 1846.
Harmonic Tremors was created on 2007-01-26.
City Harmonic
It reduces the amount of harmonic drone created by the exhaust noise.
Harmonic = Armónico
The fundamental = 1st harmonic is not an overtone!Fundamental frequency = 1st harmonic.2nd harmonic = 1st overtone.3rd harmonic = 2nd overtone.4th harmonic = 3rd overtone.5th harmonic = 4th overtone.6th harmonic = 5th overtone.Look at the link: "Calculations of Harmonics from FundamentalFrequency".
a basic harmonic progression (APEX)
The first harmonic is the fundamental. The second harmonic the first overtone. The third harmonic the second overtone. The fourth harmonic the third overtone. Even-numbered harmonics are odd-numbered overtones. Odd-numbered harmonics are even-numbered overtones.
The fundamental = 1st harmonic is not an overtone!Fundamental frequency = 1st harmonic.2nd harmonic = 1st overtone.3rd harmonic = 2nd overtone.4th harmonic = 3rd overtone.5th harmonic = 4th overtone.6th harmonic = 5th overtone.Look at the link: "Calculations of Harmonics from Fundamental Frequency".
The fundamental = 1st harmonic is not an overtone!Fundamental frequency = 1st harmonic.2nd harmonic = 1st overtone.3rd harmonic = 2nd overtone.4th harmonic = 3rd overtone.5th harmonic = 4th overtone.6th harmonic = 5th overtone.Look at the link: "Calculations of Harmonics from FundamentalFrequency".