fundamental frequency

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fun·da·men·tal fre·quen·cy

the principal component of a sound, which has the greatest wavelength, hence the lowest tone in a sound; sounds are composed of a fundamental tone and overtones or higher tones. See: harmony, noise.

fun·da·men·tal fre·quen·cy

(F0) (fŭn'dă-men'tăl frē'kwĕn-sē)
1. acoustics The basic frequency of a vibrating object or sound as opposed to its harmonics, or the principal component of a complex sound wave.
2. The frequency of vocal fold vibration at the glottis, unaffected by resonance.
See also: optimal pitch
References in periodicals archive ?
From the results of the investigations conducted in this work, it was established that not only for each rubber, but also for each formulation, the dynamic factor should be determined individually These properties, determined on specimens of the material, characterize the rigidity of the end product and, consequently, its natural frequency. The change in these parameters in the process of storage and service leads to displacement in one direction or other of the resonance zone, which occasionally is critical for different navigational and other sensitive systems.
The tensioning stress field is the most important link for the model, which can also determine the precision of the natural frequency. Therefore, the tensioning stress test was carried out to confirm the accuracy of the model.
Step 7: Calculate the speed at the maximum time frame from vibration using this first natural frequency
% DELAMINATION Natural frequency, Hz 0 5 10 15 20 25 30 35 40 45 50 S-S-S-S 857 856 753 736 731 691 650 608 571 507 425 F-F-F-F 833 821 753 714 692 676 636 591 559 480 434 C-C-C-C 897 880 796 779 769 714 704 658 610 564 510 C-F-F-F 858 812 777 743 714 706 677 612 582 500 482 % DELAMINATION Natural frequency, Hz 55 60 65 70 75 S-S-S-S 307 202 205 202 202 F-F-F-F 293 194 191 191 177 C-C-C-C 358 308 299 287 280 C-F-F-F 347 312 311 309 308 Fig.
Therefore, to find this effect experimental value of first natural frequency was used and iterations were made in the software until the value of first natural frequency does not match with the experimental value.
Fluid-structural coupled natural frequency [f.sub.Ck] (Hz) Number of water 50 200 500 1000 2000 sound modals involved Number of plate 50 50 50 50 50 modals involved k 0 0 0 0 0 0 1 106.8 103.1 101.5 100.9 100.3 2 218.5 208.4 206.0 203.9 202.5 3 234.4 222.7 217.6 215.5 213.4 4 291.1 270.9 264.7 262.2 259.7 5 447.6 415.1 404.7 400.2 395.9 6 455.4 420.7 409.1 404.5 399.8 7 476.1 457.3 451.8 447.1 443.9 8 561.9 543.1 537.2 533.4 530.5 9 626.7 581.5 566.2 559.0 552.3 10 682.5 617.7 599.4 592.1 584.7 Table 2: Coupled natural frequencies with different number of plate modals involved.
Caption: Figure 6: Behavior of the fundamental solution d(x), according to critical natural frequency [[omega].sub.c] = [square root of (a/e)], using L = 5 x [10.sup.-9] and Al [111] beam configuration, including surface effects (dashed line) and classical case (solid line).
(ii) Case of M-1 (symmetric fourth): lateral natural frequency is 1.025 Hz M = 9.72e4, m = 3.35e3, k = 4.031566e6, and C = 3.387e3
It is close to the natural frequency of the chest and heart.
The switch to a healthy lifestyle eventually found Stein and Rina learning about Natural Frequency Technology.
The mean value of the first natural frequency is 4.681 Hz with a standard deviation of 0.018 Hz.