21. Resonating bass traps will absorb sound with high efficiency at their fundamental frequency of resonance. 22. The fundamental frequency is influenced by the length, size, and tension of the vocal folds. 23. It is normally tuned a point between the crystal's fundamental frequency and its first harmonic. 24. A frequency standard generates a fundamental frequency with a high degree of accuracy and precision. 25. However the actual fundamental frequency may differ from the perceived fundamental frequency because of overtones. 26. Growling has a fundamental frequency of 380 450 Hz, and is usually emitted during food challenges. 27. Barking has a fundamental frequency between 320 904 Hz, and is usually emitted by startled wolves. 28. Overtones are integer multiples of the fundamental frequency . 29. Non-linear loads create harmonic currents in addition to the original ( fundamental frequency ) AC current. 30. The fundamental frequency is defined as its reciprocal:
