X0303 4 2011-02-04 0 0000924383 LRAD Corp LRAD 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M C/O SPECIAL SITUATIONS FUNDS 527 MADISON AVENUE, SUITE 2600 NEW YORK NY 10022 0 0 1 0 Common Stock 2011-02-04 4 J 0 788090 2.67 A 3985271 I By Limited Partnerships Warrants 2.67 2011-02-04 4 J 0 788090 0 D 2006-08-07 2011-02-06 Common Stock 788090 0 I By Limited Partnerships Warrants 2.67 2011-02-04 4 J 0 788090 0 A 2011-02-04 2016-02-04 Common Stock 788090 788090 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) & David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Private Equity Fund, L.P. (PE), Special Situations Technology Fund, LP (Tech) & Special Situations Technology II, Fund, L.P. (Tech II), respectively. 1,832,257 shares of Common Stock are held by QP, 612,989 shares of Common Stock are held by PE, 213,423 shares of Common Stock are held by Tech and 1,326,602 shares of Common Stock are held by Tech II. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, PE, Tech, and Tech II is limited to the extent of his pecuniary interest. The Funds exercised their warrants in exchange for common shares and warrants to purchase common shares at $2.67. This is a joint filing by Austin W. Marxe (Marxe) & David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Private Equity Fund, L.P. (PE), Special Situations Technology Fund, LP (Tech) & Special Situations Technology II, Fund, L.P. (Tech II), respectively. 372,466 Warrants are held by QP, 102,564 Warrants are held by PE, 43,385 Warrants are held by Tech & 269,675 Warrants are held by Tech II. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, PE, Tech, and Tech II is limited to the extent of his pecuniary interest. Austin W. Marxe 2011-02-08 David M. Greenhouse 2011-02-08