The Modifications In The Siren Police Use

The lights and siren police use work together most of the time, though not always. Their importance could also vary, based on where they are used or when they are used. When an emergency vehicle is approaching from behind, the other vehicles have to hear it first to be able to give way. For that, the sound of the siren is very important. Though the shrieking whine of police vehicles is familiar to people, it is sometimes found that even that is not sufficient to warn other vehicles.

 As such, the siren police use has been undergoing steady modifications. Vehicle occupants often fail to hear the sound because modern cars have sound proofing options that can shut out outside sounds. Besides, lots of passengers play the radio or cassettes and CDs inside the vehicle, talk on cell phones or among themselves, or may attend to a howling baby. All this could make them impervious to the siren police vehicles use.

 To solve this problem and alert them to outside sounds, some police are using howlers on their sirens. These are addenda that can be fitted on to the existing sirens of 100 to 200 watts. Howlers emit low frequency tones that are deep and sharper and so can penetrate into other vehicles better during conditions of high traffic and resultant high noise levels. Howlers typically consist of one amplifier and two speakers and provide an extra level of warning to the siren police routinely use.

 The vibrations emitted by the howlers are rather felt than heard. These vibrations typically flow into other vehicles on the road, which need to give way to the police vehicles, ambulances, or fire engines. Howlers also have inbuilt timers that shut out the system after a certain time, to protect the operator from over-exposure to the sound. When a howler is activated in a vehicle, those inside it should wear hearing protection since its vibrations are keener than the conventional siren police have.

 Another modification for the traditional siren is the rumbler, which too works in a more or less similar way, by passing on vibrations rather than high level screeches. Emergency vehicles are prevented from speeding the way they want because the vehicle that is blocking it is too often not aware of its presence. With the rumblers, vibrations can be sent to a distance of up to 200' when the blocking vehicle will feel even the ground beneath it quivering. Like howlers, rumblers are also used with the normal siren police have on their vehicles.

 However, everybody is not favor of howlers and rumblers. There are groups like Noise Free America, Silent Majority, etc. who does not contribute to the idea of more noise in the world. They feel that these siren add-ons do not do anything other than make the world more cacophonous than it normally is. They feel that the conventional siren police have on their vehicles have done the job well and will continue to do it. The remedy, according to them, is to bring laws to reduce the use of loud stereos and other amplifying mechanisms that increase noise pollution.Find various topic on Google Plus, Facebook and Twitter.