TYPES OF EAR PROTECTORS
Types of ear protectors can be grouped under two main headings.
Ear Plugs: Plugs placed inside the outer ear canal or obstructing the entrance of the ear. The structure and size of the ear canals are different, making it possible to make ear plugs in different sizes and shapes. These plugs are produced in different shapes and sizes from materials such as plastic, rubber, silicone and cotton.
They can be found in four types;
Plugs Fitting All Ears; paraffin wax cotton and similar materials are used once and then discarded. Normal cotton is ineffective.
Shaped sponges or spongy materials, one-time use of foam-type plugs of the same size. Because they are minimized by hand then inserted into the ear. Plugs take the shape of the ear canal by trying to get the old shape in the ear and completely seal the canal to provide an excellent seal.
These types of ear plugs are comfortable, clean and inexpensive. However, when placing the plug, the hands must be clean. This type of stopper can be used for up to a week
Ear Plugs Made of Rubber, Rubber and Plastic Materials; they can be used repeatedly. The plugs made of rubber and plastic are among the most preferred types due to their ease of cleaning and long-term use. There are two types; The universal type fits most people's ears. Variable-Size Type The protector is available in small, medium and large types to fit the ear comfortably. However, it can harden and shrink over time. In this case, they do not fit fully in the ear canal and lose their effectiveness.
Custom Made Ear Plugs : Silicone rubber or plastic ear size is taken, prepared accordingly. They are clean, comfortable and fit perfectly and can be used for three to five years.
Ear plugs reduce noise by 15-30 dB when proper selection and proper use are achieved. The user must be checked before ear plugs are used. The physical shape of the ear canal may interfere with protective use. In the event that the ear canal is filled with hardened ear impurities, it is decided to use the preservative after the necessary inspection and cleaning is completed.
Protectors by Covering the Ear Canal Inlet: Protectors made of a soft rubber-like material that is held firmly on the ear canal inlet by an elastic band over the head. Suitable for use by people entering and leaving the noisy area frequently, these protectors can be used in many jobs. It is also often recommended for people who do not use ear plugs.
2. Ear Covers (Ear Sleeve Type) Ear Protectors; They are two or more containers which can be adjusted up and down and are secured by a flexible band that passes over the head, neck or under the chin. These containers are generally of hemispherical shape made of insulating hard plastic. Around the container are sound-absorbing cushions, usually made of plastic, which are filled with air, liquid or foamy, spongy material to close the sides of the ears. They can be individually adjusted with these holding straps, which ensure that the containers covering the ear stay on the ear with the appropriate frequency. The width of the container, the circumference of the circle and the cushion of the ear canister are also very important in order to provide a good acoustic barrier. The pad filled with oil or oil provides better protection than other types.
These ear protectors are used to protect against severe, high frequency noise. They can reduce noise between 15-30 dB. (It is recommended that the ear protectors and ear plugs be used (together) where the noise level exceeds 105 dB (A).
Such protectors reduce the noise by 10-15 dB more than the ear plugs. When the muff-type ear protector and ear plugs are used together, the total sound reduction is 3-5 dB higher than the muffle-provided sound reduction.
To be safe, convenient and convenient to use;
. The tape on the head should not be too tight or loose.
. The protective containers must not touch any part of the pinna.
. It should be light to be used for a long time.
2.1 Hearing Protective Helmets: When the noise level is too high, the helmets can be mounted on the helmets of 115-120 dB and above. This type of protector closes the bony parts of the head, preventing sound from leaking through the bone conduction.
The selection of suitable ear protectors is of great importance for the comfort of use. Some people are reluctant to use a preservative, taking into account the risk of hearing loss by being affected by physical and psychological disturbances caused by the preservative. Here the slow, painless and long years of hearing loss caused by noise is the most important reason for not using it. Trio of cause, effect and importance; it is not as fast as hand cutting or burring into the eye. The most important way to overcome these problems is education. Personal interviews are other ways of encouraging.
EVENTS
The effectiveness of an ear protector depends on many factors. Sound energy enters the ear directly from or around the protectors. There are four ways in which the sound can reach the inner ear when using a protector (Figure 5);
1- Air Leakage:
2. Material leakage,
3- Protective Vibration or tissue transmission,
1- Air Leakage: Small air leaks between the ear protector and the ear canal allow low frequencies to pass through. As the air leakage begins to increase, the level of sound attenuation at all frequencies decreases.
2- Material Leakage: Sound passes through the protector due to sealing. Ear protectors can prevent the transmission of sound, as well as the wrong choice of protection or misuse of the sound is passed through.
3- Protective Vibration: This is the vibration produced by the ear protectors' response to external sound energy interference. The amount of sound transmitted in this way depends on the material, design and mass of the protector.
4- Bone Conduction: Even if the ear canal is completely closed and the sound is prevented by this way, it cannot prevent the sound to reach the inner ear through bone conduction. However, the sound level transmitted in this way will be 50 dB below the level that reaches the no-ear ear.
13AXX
Mpow 055A Ear Plugs 60 Pairs, Super Soft Foam Ear Plugs 34dB SNR, Noise Reduction Hearing Protector, with Aluminum Carry Case, for Sleeping, Woodworking, Shooting, Travel, Loud Events-Green
