Difference between revisions of "Dictionary:Acoustic wave"

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<b>1</b>. A P-wave, sometimes restricted to P-waves in fluids, but often including those in the solid earth. Synonyms: <b>sound wave, sonic wave. 2</b>. The wavetrain generated and detected by a sonic-logging sonde (see [[Special:MyLanguage/Dictionary:acoustic_log|''acoustic log'']] and Figure [[Special:MyLanguage/Dictionary:Fig_A-4|A-4]]). The wavetrain is a composite of various modes of energy transfer. The first arrival usually results from P-waves traveling in the adjacent formation, where the sonic log measures the slowness (specific transit time or inverse of its velocity). An S-wave traveling in the formation is sometimes a second arrival, but sometimes the second arrival is a tube wave in the borehole fluid. Waves traveling through the mud usually have relatively high-frequency content. Modes of high-amplitude, low-frequency tube waves (sometimes called Stoneley waves) are often distinct arrivals. <b>3</b>. More generally, any elastic wave or seismic wave.
 
<b>1</b>. A P-wave, sometimes restricted to P-waves in fluids, but often including those in the solid earth. Synonyms: <b>sound wave, sonic wave. 2</b>. The wavetrain generated and detected by a sonic-logging sonde (see [[Special:MyLanguage/Dictionary:acoustic_log|''acoustic log'']] and Figure [[Special:MyLanguage/Dictionary:Fig_A-4|A-4]]). The wavetrain is a composite of various modes of energy transfer. The first arrival usually results from P-waves traveling in the adjacent formation, where the sonic log measures the slowness (specific transit time or inverse of its velocity). An S-wave traveling in the formation is sometimes a second arrival, but sometimes the second arrival is a tube wave in the borehole fluid. Waves traveling through the mud usually have relatively high-frequency content. Modes of high-amplitude, low-frequency tube waves (sometimes called Stoneley waves) are often distinct arrivals. <b>3</b>. More generally, any elastic wave or seismic wave.
  
 
 
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[[File:Sega4.jpg|thumb|center|450px|FIG. A-4. <b>Acoustic wavetrain</b> in a borehole (idealized).]]
 
[[File:Sega4.jpg|thumb|center|450px|FIG. A-4. <b>Acoustic wavetrain</b> in a borehole (idealized).]]
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Latest revision as of 19:08, 6 June 2020

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1. A P-wave, sometimes restricted to P-waves in fluids, but often including those in the solid earth. Synonyms: sound wave, sonic wave. 2. The wavetrain generated and detected by a sonic-logging sonde (see acoustic log and Figure A-4). The wavetrain is a composite of various modes of energy transfer. The first arrival usually results from P-waves traveling in the adjacent formation, where the sonic log measures the slowness (specific transit time or inverse of its velocity). An S-wave traveling in the formation is sometimes a second arrival, but sometimes the second arrival is a tube wave in the borehole fluid. Waves traveling through the mud usually have relatively high-frequency content. Modes of high-amplitude, low-frequency tube waves (sometimes called Stoneley waves) are often distinct arrivals. 3. More generally, any elastic wave or seismic wave.

FIG. A-4. Acoustic wavetrain in a borehole (idealized).