OYO Geospace (OYOG)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-40893, No. 333-80003, No. 333-122834 and No. 333-122835) of OYO Geospace Corporation of our report dated December 7, 2006 relating to the financial statements and financial statement schedule, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

December 4, 2008

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-40893, No. 333-80003, No. 333-122834 and No. 333-122835) of OYO Geospace Corporation of our reports dated December 4, 2008, relating to the consolidated financial statements and financial statement schedule as of and for the years ended September 30, 2008 and 2007, and the effectiveness of internal control over financial reporting as of September 30, 2008, which appear in this Form 10-K.

/s/ UHY LLP

Houston, Texas

December 4, 2008

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-40893, No. 333-80003, and No. 333-122834) and on Form S-3 (No. 333-132078) of OYO Geospace Corporation of our reports dated December 7, 2007, relating to the consolidated financial statements and financial statement schedule as of and for the year ended September 30, 2007, and the effectiveness of internal control over financial reporting as of September 30, 2007, which appear in this Form 10-K.

/s/ UHY LLP

Houston, Texas

December 7, 2007

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-40893, No. 333-80003, No. 333-122834 and No. 333-122835) of OYO Geospace Corporation of our report dated December 7, 2006 relating to the financial statements and financial statement schedule, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

December 7, 2007

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-40893, No. 333-80003, No. 333-122834 and No. 333-122835) of OYO Geospace Corporation of our report dated December 7, 2006 relating to the financial statements, financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

December 7, 2006