SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* KOBAYASHI KATSUHIKO (Last) (First) (Middle) ICHIGAYA BUILDING 2-6 KUDAN-KITE 4 CHOME, CHIYODA-KU TOKYO 102 (Street) JAPAN M0 00000 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol OYO GEOSPACE CORP [ OYOG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 04/24/2006
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $.01 par value	04/24/2006		X		160,000	D	$14	1,285,000	I	By OYO Corporation U.S.A.

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Options (obligation to sell)(1)	$14	04/24/2006		X			160,000	04/17/2001	04/15/2008	Common Stock	160,000	$0	0(2)	I	By OYO Corporation U.S.A.

Explanation of Responses:

1. Pursuant to a privately negotiated agreement between OYO Corporation U.S.A. and Ernest M. Hall, Jr. dated as of April 16, 1998, as amended, OYO Corporation U.S.A. granted Mr. Hall options to purchase 160,000 shares of common stock, par value $.01 per share of OYO Geospace Corporation held by OYO Corporation U.S.A. Mr. Hall holds options to purchase an additional 135,000 shares of common stock, par value $.01 per share, of OYO Geospace Corporation held by OYO Corporation U.S.A. pursuant to another privately negotiated agreement between OYO Corporation U.S.A. and Ernest M. Hall, Jr. dated as of June 28, 2002. OYO Geospace Corporation is not a party to this transaction.

2. The reported transaction reflects Mr. Hall's exercise of the options granted pursuant to the agreement described in Footnote 1 for 160,000 shares of common stock, par value $.01 per share of OYO Geospace Corporation held by OYO Corporation U.S.A. Mr. Hall also holds options for 135,000 shares of common stock, par value $.01 per share of OYO Geospace Corporation held by OYO Corporation U.S.A. pursuant to another privately negotiated agreement with OYO Corporation U.S.A.

	Katsuhiko Kobayashi	04/25/2006
	** Signature of Reporting Person	Date
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* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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