X0306 4 2013-06-07 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 2013-06-07 4 P 0 682439 0.95 A 4667710 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. 2,147,462 shares of Common Stock are held by QP, 715,290 shares of Common Stock are held by PE, 250,139 shares of Common Stock are held by Tech and 1,554,819 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. Austin W. Marxe 2013-06-11 David M. Greenhouse 2013-06-11