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  • ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    3 KB (430 words) - 18:19, 6 June 2020
  • ...d to upscale sonic-log data for synthetic seismogram manufacture. Involves harmonic averaging to find the anisotropic elastic parameters that characterize seis
    629 bytes (76 words) - 23:24, 3 October 2020
  • ...sub>''n''</sub> is the rms voltage of the ''n''th harmonic, the <b>percent harmonic distortion</b> is
    2 KB (254 words) - 21:04, 3 April 2017
  • The input amplitude for which the distortion-generated third harmonic becomes a certain percentage, generally 3% but sometimes 1%. For smaller in
    304 bytes (37 words) - 21:04, 3 April 2017
  • ...surface sources produces spurious correlations, especially for the second harmonic (which may be very large). This produces a distortion tail that follows the
    411 bytes (55 words) - 21:05, 3 April 2017
  • .... An equation derived from the wave equation through the substitution of a harmonic wave trial solution into the wave equation. In one form of the eikonal equa
    2 KB (365 words) - 19:12, 8 April 2019
  • ...a plane reflector mainly effective in generating a reflection since, for a harmonic wave, the effects of successive zones generally cancel each other. A nomogr
    1 KB (207 words) - 18:05, 14 November 2017
  • The lowest frequency of a periodic function. Also called the <b>first harmonic</b>.
    204 bytes (26 words) - 14:48, 2 March 2017
  • ...tionary:correlation_ghost|''correlation ghost'']] (q.v.) that results from harmonic distortion when using vibroseis.
    880 bytes (134 words) - 16:14, 13 June 2018
  • {{#category_index:H|harmonic}} ...frequency that is a simple multiple of a fundamental frequency. The third harmonic, for example, has a frequency three times that of the fundamental. <b>2</b>
    478 bytes (72 words) - 17:07, 22 July 2017
  • {{#category_index:H|harmonic analysis}}
    333 bytes (42 words) - 17:10, 22 July 2017
  • {{#category_index:H|harmonic average}} The reciprocal of a harmonic average is given by the sum of the weighted reciprocals of the elements to
    521 bytes (75 words) - 17:12, 22 July 2017
  • {{#category_index:H|harmonic distortion}}
    262 bytes (29 words) - 18:08, 22 July 2017
  • {{#category_index:H|harmonic function}}
    255 bytes (30 words) - 18:10, 22 July 2017
  • {{#category_index:H|harmonic mean}}
    175 bytes (19 words) - 18:15, 22 July 2017
  • The space-dependent form of the wave equation for a wave that is harmonic in time:
    2 KB (271 words) - 15:26, 5 January 2021
  • ...ral logarithm of the ratio of the amplitudes of two successive cycles of a harmonic event. Where the amplitude decay is because of absorption, the logarithmic
    366 bytes (51 words) - 17:58, 13 April 2019
  • ...essed as a percentage of the amount which will produce a certain amount of harmonic distortion. <b>3</b>. Sometimes used to imply the number of bits used to re
    711 bytes (102 words) - 14:42, 13 July 2018
  • ...des microseisms, source-generated noise, multiples, tape-modulation noise, harmonic distortion, etc. Sometimes divided into coherent noise (including nonreflec
    585 bytes (72 words) - 07:32, 31 October 2017
  • ...es of exploration interest. Ordinarily computed from a low-order spherical harmonic expansion constrained by satellite measurements. The normal field of the Ea
    797 bytes (110 words) - 15:22, 11 December 2017
  • A function that repeats after successive equal intervals of time; a <b>harmonic function</b>.
    220 bytes (28 words) - 14:56, 7 March 2018
  • ...a plot of the phase relationship of the component sinusoids determined by harmonic analysis graphed versus frequency.
    274 bytes (38 words) - 18:22, 12 March 2018
  • ...e of amplitude with distance because of absorption; the amplitude of plane harmonic waves is often written as
    3 KB (497 words) - 11:00, 29 November 2020
  • {{#category_index:S|spherical harmonic}}
    218 bytes (24 words) - 09:52, 6 September 2017
  • ...'']]. Wave motion at a point is often described mathematically in terms of harmonic components:
    3 KB (537 words) - 09:42, 30 November 2017
  • ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    845 bytes (128 words) - 00:03, 14 February 2020
  • ...e x-k extrapolator, de-aliasing interpolation, delayed-shot migration, and harmonic-shot migration.
    8 KB (1,270 words) - 12:41, 20 June 2016
  • harmonic analysis (read wavelets) was worthwhile. Gilles
    5 KB (814 words) - 19:47, 14 February 2014
  • analysis, signal estimation theory, and modern concepts in harmonic analysis to develop robust and
    5 KB (719 words) - 14:56, 17 October 2016
  • and vibroseis. He published on vibrator efficiency, harmonic
    4 KB (646 words) - 11:12, 18 October 2016
  • ...erate in 1998. A few years later, most contractors had developed their own harmonic distortion-reduction algorithms, making Justus’ vision of a large number
    5 KB (717 words) - 15:25, 17 October 2016
  • ...c data]]. In our simple example, let us assume that we know the signal has harmonic content and is therefore sparse in the Fourier domain.
    9 KB (1,356 words) - 16:40, 16 February 2016
  • ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    799 bytes (122 words) - 22:49, 16 March 2017
  • ...sub>''n''</sub> is the rms voltage of the ''n''th harmonic, the <b>percent harmonic distortion</b> is
    1 KB (236 words) - 21:05, 3 April 2017
  • The input amplitude for which the distortion-generated third harmonic becomes a certain percentage, generally 3% but sometimes 1%. For smaller in
    245 bytes (31 words) - 21:05, 3 April 2017
  • ...surface sources produces spurious correlations, especially for the second harmonic (which may be very large). This produces a distortion tail that follows the
    352 bytes (49 words) - 21:07, 3 April 2017
  • ...e of amplitude with distance because of absorption; the amplitude of plane harmonic waves is often written as
    3 KB (457 words) - 11:01, 29 November 2020
  • {{#category_index:H|harmonic}} ...frequency that is a simple multiple of a fundamental frequency. The third harmonic, for example, has a frequency three times that of the fundamental. <b>2</b>
    419 bytes (66 words) - 17:08, 22 July 2017
  • {{#category_index:H|harmonic analysis}}
    274 bytes (36 words) - 17:10, 22 July 2017
  • {{#category_index:H|harmonic average}} The reciprocal of a harmonic average is given by the sum of the weighted reciprocals of the elements to
    404 bytes (61 words) - 17:12, 22 July 2017
  • {{#category_index:H|harmonic distortion}}
    203 bytes (23 words) - 18:08, 22 July 2017
  • {{#category_index:H|harmonic function}}
    196 bytes (24 words) - 18:11, 22 July 2017
  • {{#category_index:H|harmonic mean}}
    116 bytes (13 words) - 18:15, 22 July 2017
  • {{#category_index:S|spherical harmonic}}
    133 bytes (16 words) - 09:53, 6 September 2017
  • {{#category_index:S|spherical harmonic}}
    133 bytes (19 words) - 09:55, 6 September 2017
  • ...des microseisms, source-generated noise, multiples, tape-modulation noise, harmonic distortion, etc. Sometimes divided into coherent noise (including nonreflec
    526 bytes (66 words) - 07:32, 31 October 2017
  • ...a plane reflector mainly effective in generating a reflection since, for a harmonic wave, the effects of successive zones generally cancel each other. A nomogr
    1 KB (201 words) - 11:13, 21 November 2017
  • The lowest frequency of a periodic function. Also called the <b>first harmonic</b>.
    145 bytes (20 words) - 14:49, 2 March 2017
  • The space-dependent form of the wave equation for a wave that is harmonic in time:
    336 bytes (47 words) - 23:25, 23 January 2017
  • ...d to upscale sonic-log data for synthetic seismogram manufacture. Involves harmonic averaging. <b>2</b>. Calculating the anisotropic elastic parameters that ch
    360 bytes (44 words) - 08:25, 24 January 2017
  • ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    3 KB (418 words) - 08:50, 26 March 2018
  • A function that repeats after successive equal intervals of time; a <b>harmonic function</b>.
    161 bytes (22 words) - 10:08, 26 March 2018
  • ...a plot of the phase relationship of the component sinusoids determined by harmonic analysis graphed versus frequency.
    215 bytes (32 words) - 09:47, 28 March 2018
  • ...'']]. Wave motion at a point is often described mathematically in terms of harmonic components:
    3 KB (513 words) - 10:20, 28 March 2018
  • ...es of exploration interest. Ordinarily computed from a low-order spherical harmonic expansion constrained by satellite measurements. The normal field of the Ea
    738 bytes (104 words) - 10:21, 28 March 2018
  • Finally, here’s a volcanic “scream” — a harmonic tremor preceeding an explosive eruption at Mount Redoubt, Alaska, in March
    11 KB (1,754 words) - 18:04, 15 September 2021
  • ...essed as a percentage of the amount which will produce a certain amount of harmonic distortion. <b>3</b>. Sometimes used to imply the number of bits used to re
    652 bytes (96 words) - 15:42, 13 July 2018
  • * [[Directivity of a harmonic source plus ghost]]
    12 KB (1,339 words) - 15:21, 30 July 2019
  • * [[Directivity of a harmonic source plus ghost]]
    5 KB (748 words) - 16:13, 8 November 2019
  • Show that for harmonic waves of the form
    4 KB (566 words) - 12:23, 14 February 2019
  • A refraction seismic wavelet assumed to be essentially harmonic with a frequency of 40 Hz is found to have amplitudes of 5.00 and 4.57 mm o A damped harmonic wave can be written
    6 KB (896 words) - 12:12, 14 February 2019
  • ...ynergic working environment internally & externally through integrated and harmonic communication
    13 KB (1,983 words) - 01:14, 30 March 2021
  • ...rms of displacements, the instantaneous kinetic energy density ''E'' for a harmonic P-wave <math>u=A\cos \omega t</math> is equal to
    18 KB (2,524 words) - 17:05, 7 November 2019
  • ...of the medium and potential energy due to the strains in the medium. For a harmonic wave <math>\psi =A \sin \omega t</math>, the particle velocity is <math>\pa
    7 KB (990 words) - 17:08, 7 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    5 KB (594 words) - 12:33, 15 May 2019
  • * [[Directivity of a harmonic source plus ghost]]
    5 KB (679 words) - 12:34, 15 May 2019
  • * [[Directivity of a harmonic source plus ghost]]
    5 KB (641 words) - 16:15, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    4 KB (566 words) - 16:16, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    6 KB (794 words) - 12:35, 15 May 2019
  • * [[Directivity of a harmonic source plus ghost]]
    8 KB (1,114 words) - 16:16, 8 November 2019
  • | align="center" | [[Directivity of a harmonic source plus ghost]] * [[Directivity of a harmonic source plus ghost]]
    5 KB (673 words) - 16:17, 8 November 2019
  • [[file:Ch06_fig6-9a.png|thumb|center|{{figure number|6.9a.}} Directivity of a harmonic source at depth <math>z=c\lambda</math>.]] * [[Directivity of a harmonic source plus ghost]]
    5 KB (618 words) - 16:18, 8 November 2019
  • | align="center" | [[Directivity of a harmonic source plus ghost]] * [[Directivity of a harmonic source plus ghost]]
    10 KB (1,351 words) - 16:20, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    4 KB (482 words) - 16:22, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    4 KB (462 words) - 16:22, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    5 KB (707 words) - 16:23, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    4 KB (569 words) - 16:24, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    11 KB (1,666 words) - 16:25, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    9 KB (1,199 words) - 16:28, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    4 KB (483 words) - 16:28, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    9 KB (1,456 words) - 16:30, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    3 KB (411 words) - 12:26, 15 May 2019
  • * [[Directivity of a harmonic source plus ghost]]
    5 KB (687 words) - 16:33, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    6 KB (936 words) - 16:34, 8 November 2019
  • * [[Directivity of a harmonic source plus ghost]]
    7 KB (897 words) - 16:35, 8 November 2019
  • Assuming a harmonic wave function <math>\psi _{P}</math>, we can write
    13 KB (2,024 words) - 08:57, 20 May 2019
  • ...{3}i/{\rm d}t^{3}</math> in the geophone equation (7.9a), show that, for a harmonic wave, it can be included approximately in the term involving the damping fa ...0</math> in equation (7.9b), the equation becomes that for undamped simple harmonic motion; if the geophone is at rest and the coil is set in motion, it oscill
    6 KB (879 words) - 09:06, 20 May 2019
  • ...se determined by equation (7.9b) is frequency dependent; when the input is harmonic such that the vertical velocity of the geophone is <math>{\rm d}z/{\rm d}t=
    6 KB (783 words) - 09:10, 20 May 2019
  • The response of this array to a harmonic signal is shown in Figure 8.10a.
    4 KB (580 words) - 09:34, 20 May 2019
  • ...ibroseis method employs a vibrator to impart to the ground a long train of harmonic signals of varying frequency. The vibrator consists of a piston pressing ag ...ces harmonics into the ground, principally the second harmonic. The second harmonic produces reflected wavetrains like the primary reflected wavetrains, but th
    8 KB (1,154 words) - 13:44, 25 June 2019
  • ...undamental angular frequency'', <math>\omega _{n} =n\omega _{0} =</math> ''harmonic frequency'', and the amplitudes and phases are given by the following equat
    10 KB (1,575 words) - 10:13, 16 July 2019
  • Equations (9.1a,b,c) apply to a harmonic function which repeats after every interval <math>T</math>. If we let <math
    12 KB (1,829 words) - 10:13, 16 July 2019
  • A most common example of a simple harmonic wave - the pendulum. When a pendulum is displaced sideways from its resting
    5 KB (777 words) - 21:41, 14 October 2019
  • For a sinusoidal wave with simple harmonic motion, the position of each mass element may be modeled as The simple and harmonic motion with an angular frequency (ω) given by
    10 KB (1,656 words) - 22:19, 15 December 2021
  • ...nterests include geophysical inversion, seismic imaging, wave propagation, harmonic analysis, time-frequency analysis, and nonstationary filtering. He is a mem
    1 KB (158 words) - 17:08, 26 August 2020
  • ...ch waves are known as sinusoidal waves or, in older terminology, as simple harmonic waves. Because, by Fourier’s theorem, any periodic function can be synthe
    14 KB (2,264 words) - 14:46, 22 April 2021
  • ...\omega </math>. Such motion is called either sinusoidal motion or ''simple harmonic motion''. Instead of using a continuous time scale ''t'' for the signal, di ...locity <math>\omega</math>. The components of this vector represent simple harmonic motion.
    7 KB (1,071 words) - 15:46, 30 April 2021
  • Let us now apply the sampling concept to simple harmonic motion. We will see that the most important consequence of sampling a funct
    9 KB (1,344 words) - 15:52, 30 April 2021
  • ...be low-pass-filtered by an antialias filter that effectively destroys all harmonic components above 125 Hz. In this way, these high frequencies will not appea
    8 KB (1,221 words) - 16:00, 30 April 2021
  • ...frequency-domain filtering. Before doing so, a brief discussion of simple harmonic motion is in order. A sinusoidal signal <math>e^{i\omega n\Delta t}</math> represents simple harmonic motion. Now let this sinusoid be the input to the various digital filters t
    11 KB (1,819 words) - 13:19, 3 May 2021
  • ...ch waves are known as sinusoidal waves or, in older terminology, as simple harmonic waves. Because, by Fourier’s theorem, any periodic function can be synthe
    13 KB (2,156 words) - 09:53, 13 May 2021
  • ...ch waves are known as sinusoidal waves or, in older terminology, as simple harmonic waves. Because, by Fourier’s theorem, any periodic function can be synthe
    13 KB (2,144 words) - 14:49, 22 April 2021
  • ...\omega </math>. Such motion is called either sinusoidal motion or ''simple harmonic motion''. Instead of using a continuous time scale ''t'' for the signal, di ...locity <math>\omega</math>. The components of this vector represent simple harmonic motion.
    7 KB (1,018 words) - 16:27, 7 May 2021
  • ...\omega </math>. Such motion is called either sinusoidal motion or ''simple harmonic motion''. Instead of using a continuous time scale ''t'' for the signal, di ...locity <math>\omega</math>. The components of this vector represent simple harmonic motion.
    7 KB (1,013 words) - 15:48, 30 April 2021
  • Let us now apply the sampling concept to simple harmonic motion. We will see that the most important consequence of sampling a funct
    8 KB (1,286 words) - 16:28, 7 May 2021
  • Let us now apply the sampling concept to simple harmonic motion. We will see that the most important consequence of sampling a funct
    8 KB (1,280 words) - 15:53, 30 April 2021
  • ...be low-pass-filtered by an antialias filter that effectively destroys all harmonic components above 125 Hz. In this way, these high frequencies will not appea
    8 KB (1,177 words) - 16:00, 30 April 2021
  • ...be low-pass-filtered by an antialias filter that effectively destroys all harmonic components above 125 Hz. In this way, these high frequencies will not appea
    8 KB (1,184 words) - 16:29, 7 May 2021
  • ...frequency-domain filtering. Before doing so, a brief discussion of simple harmonic motion is in order. A sinusoidal signal <math>e^{i\omega n\Delta t}</math> represents simple harmonic motion. Now let this sinusoid be the input to the various digital filters t
    10 KB (1,707 words) - 13:21, 3 May 2021
  • ...frequency-domain filtering. Before doing so, a brief discussion of simple harmonic motion is in order. A sinusoidal signal <math>e^{i\omega n\Delta t}</math> represents simple harmonic motion. Now let this sinusoid be the input to the various digital filters t
    10 KB (1,716 words) - 15:44, 19 May 2021
  • ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    2 KB (130 words) - 23:30, 7 December 2021