Download Tag: POLICE SIREN

CHAPTER ONE INTRODUCTION 1.1 BACKGROUND OF THE STUDY A siren is a loud noise making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulance, police cars and fire trucks. There are two ...

CHAPTER ONE                INTRODUCTION 1.1 OVERVIEW A siren is a loud noise making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulance, police cars and fire trucks. There are two general ...