Police equipment for blocking noise
Author: Sunil Punjabi
Police equipment is of different types. Some are designed exclusively for helping police in discharging their duties. There is another category of police equipment that is meant to protect policemen from the risks they are exposed to while discharging these duties. The different devices that police use for blocking out noises come under this latter category of police equipment.
The cacophony created by man is increasingly polluting the environment. Rumbling trucks, screeching motorcycles, aircrafts, guns, sirens, and bulldozers, all steadily contribute to the noise pollution pool. These deafening noises are bad enough for ordinary people, but policemen are more at risk from these shrieks as their work is always outdoors. As such, various noise-blocking devices like noise canceling headphones, earmuffs, and earplugs are necessary components of police equipment.
Noise canceling headphones that block the exterior sounds are a necessity even for ordinary people. A headphone works by producing an opposing sound wave to cancel out the outside noise. The microphone inside the headphone can analyze the approaching sound waves and produce the opposing one necessary to neutralize its effect. For a policeman inside an emergency vehicle with screeching sirens, this bit of police equipment is a must to block the ambient sounds to communicate with the office clearly, or to listen to a broadcast.
Noise blocking earmuffs and earplugs are also a part of police equipment. Earmuffs will typically have a foam padded steel headband, which will ensure user comfort, as well as meet the demands of the rugged environment in which they will be used. There will also be two or more attenuation levels for an earmuff so that the device can be adjusted to block different levels of noises. The provision will also allow the user to listen in reduced volume the sounds that are necessary to be listened to, for calculated reaction. Earplugs are another form of noise blocking police equipment. Earplugs are mostly made of polyurethane foam, and plugs with or without headbands are available.
While noise prevention devices are often necessary for police even during their routine duties, under some circumstances it becomes a legally required piece of police equipment. Nowadays a form of siren amplifier known as howler is available for use in police vehicles. This produces a low frequency tone that penetrates other vehicles by its vibrations and is used in high-risk areas to warn other vehicles more effectively. The keening sound of the howler is considered damaging to the ears. As such, users are required to have appropriate noise blocking devices while handling howlers. Even though a howler has a built-in timer to prevent the user from getting continuously exposed to it, a noise blocker is essential police equipment when using a howler.
A rumbler is also a similar advanced form of siren, which necessitates the use of noise blocking police equipment. Such extra strong sirens are becoming necessary since cars are getting noise proofed and drivers are frequently using iPods or headphones. When more sophisticated duty aids reach the market, police equipment strong enough to combat its negative effects also become mandatory.
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