De Villa, Roan R., <br/><br/>
Proposed sound sensitive auto switch-off/ 
Roan R. De Villa, Melvin B. Gabua, Abiel Y. Merilles 
 - Nabua, Camarines Sur :  Camarines Sur Polytechnic Colleges ;  2002. 
 - 52 leaves. 
<br/><br/>Undergraduate Thesis (BSECE) - Electronics Engineering