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<title>Prepared By R.R. Donnelley Financial -- Form 8-K</title>
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<b>UNITED STATES </b></font>
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<b>SECURITIES AND EXCHANGE COMMISSION </b></font></div>

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<b>Washington D.C., 20549 </b></font></div>

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<b>Form 8-K </b></font></div> <div><font Size="1">&nbsp;</font></div>

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<b>Current Report </b></font></div>

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<b>Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 </b></font></div>

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<b>Date Of Report (Date Of Earliest Event Reported):&nbsp;&nbsp;08/11/2004 </b></font></div>

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<b>OYO GEOSPACE CORP </b></font></div>

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<b>(Exact Name of Registrant as Specified in its Charter)</b></font></div>

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<b>Commission File Number:&nbsp;&nbsp;001-13601        </b></font></div>

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<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>DE</b></font>
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<b>(State or Other Jurisdiction of</b></font>
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<b>Incorporation or Organization)</b></font>
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<b>Identification No.)</b></font>
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<b>7007 Pinemont Drive  </b></font></div>

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<b>Houston, TX 77040 </b></font>
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<b>(Address of Principal Executive Offices, Including Zip Code)</b></font>
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<b>(713) 986-4444 </b></font>
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<b>(Registrant&#146;s Telephone Number, Including Area Code) </b></font>
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Items to be Included in this Report</b>
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<b>Item 7.&nbsp;&nbsp;&nbsp;&nbsp;Financial statements and exhibits</b></font>
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Exhibit 99.1  Press Release dated August 11, 2004.</font>
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<b>Item 12.&nbsp;&nbsp;&nbsp;&nbsp;Results of Operations and Financial Condition</b></font>
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On August 11, 2004, OYO Geospace Corporation issued a press release regarding its earnings results for the third fiscal quarter. The press release is attached hereto as Exhibit 99.1.  The foregoing description is qualified by reference to such exhibit.</font>
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<b>Signature(s) </b></font>
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Pursuant to the Requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the Undersigned hereunto
duly authorized. </font>
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	&nbsp;&nbsp;&nbsp;&nbsp;OYO GEOSPACE CORP</font>
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	Date: August 11, 2004.</font>
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	By:</font>
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	/s/&nbsp;&nbsp;&nbsp;&nbsp;Thomas T. McEntire</font>
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	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thomas T. McEntire</font>
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	<div Style="margin-left:9%"><font Face="times New Roman" Size="2" Color="#000000">Chief Financial Officer</font>
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<b>Exhibit Index </b></font>
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	<b>Exhibit&nbsp;No.</b></font>
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	<b>Description</b></font>
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	EX-99.1</font>
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	Press Release dated August 11, 2004.</font>
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Prepared By R.R. Donnelley Financial -- Form 8-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C., 20549
Form 8-K
Current Report
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date Of Report (Date Of Earliest Event Reported):  08/11/2004
OYO GEOSPACE CORP
(Exact Name of Registrant as Specified in its Charter)
Commission File Number:  001-13601
DE
76-0447780
(State or Other Jurisdiction of
(I.R.S. Employer
Incorporation or Organization)
Identification No.)
7007 Pinemont Drive
Houston, TX 77040
(Address of Principal Executive Offices, Including Zip Code)
(713) 986-4444
(Registrant's Telephone Number, Including Area Code)
Items to be Included in this Report
Item 7.    Financial statements and exhibits
Exhibit 99.1  Press Release dated August 11, 2004.
Item 12.    Results of Operations and Financial Condition
On August 11, 2004, OYO Geospace Corporation issued a press release regarding its earnings results for the third fiscal quarter. The press release is attached hereto as Exhibit 99.1.  The foregoing description is qualified by reference to such exhibit.
Signature(s)
Pursuant to the Requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the Undersigned hereunto
duly authorized.
OYO GEOSPACE CORP
Date: August 11, 2004.
By:
/s/    Thomas T. McEntire
Thomas T. McEntire
Chief Financial Officer
Exhibit Index
Exhibit No.
Description
EX-99.1
Press Release dated August 11, 2004.