inharmoniciteitscoëfficiënt
Inharmoniciteitscoëfficiënt refers to a measure of how much the overtones of a musical instrument deviate from perfect integer multiples of the fundamental frequency. In ideal, perfectly harmonic instruments, the first overtone is twice the fundamental, the second overtone is three times the fundamental, and so on. However, real-world instruments, especially those with strings like pianos and guitars, exhibit inharmonicity. This occurs due to the stiffness of the vibrating material. When a string vibrates, its stiffness causes the higher overtones to be slightly sharper than their ideal harmonic frequencies.
The inharmonicity coefficient quantifies this deviation. A higher coefficient indicates greater inharmonicity, meaning the overtones are