Healthvee

To the volume of the sound, as a unit decibels (dB). A decibel is a tenth of a Bel (B), or the unit invented by engineers at the Bell Telephone Laboratory to quantify the degree of sound insulation, when sound is transmitted via a miles (1.6 km) from standard telephone cable. Since the bel proved to be too large for most common sound measurements, the use of smaller decibel was always popular.

The decibel is in a variety of scientific measurements in terms of acoustics and and electronics. This unit provides a physical value – as a rule of noise or light intensity – in which a doubling of the actual intensity causes perceived intensity to increase by roughly the same amount. More specifically, an increase of 3 dB is approximately equal to an approximate doubling of sound. This is important to understand because if you look at the dB values in the following tables and text, you will understand, a relatively small numerical increase of 10 dB between the sound of rain and a sewing machine accounts for the much greater noise levels. It also shows that the 110dB sound of a screaming child is only a couple of times less intense than a thunderclap or a rock concert.

Sound reference chart

Rustling leaves 0
20 hours ticking
30 Quiet whisper
40 refrigerator hum
50 Precipitation
60 sewing machines, typical conversation level Speech
Washer 70
80 alarm clock (two metres)
85 Average Traffic
90 gas mower
95 MRI test
Tractor 100, hairdryer, a subway train
105 Power lawn mowers, chain saws
110 Screaming child
120 rock concert, ambulances, thunder strike
130 Jack Hammer, aircraft jet engine (100 metres)
Fireworks 140
165 12 gauge shotgun blast

Noise in the workplace

The National Institute for Occupational Safety and Health (NIOSH), a branch of the US Centers for Disease Control and Prevention, reported that ear injuries can develop if the employee is exposed to 85 dB or more than eight hours. As a result of this 85 dB exposure limit for an eight-hour working day has become a standard in the mining, construction, oil and gas drilling, industry and agriculture, as well as the US Air Force and Army. Hearing loss by excessively loud noises or extended NIHL, noise, or hearing loss.

Damage to the cilia cells

Sounds of less than 80 dB is not often hearing loss, even after long or repeated exposure. It is not possible to predict how an individual reacts to loud noises, because every person has a different sensitivity hearing. But the exposure to a single continuous loud noise or noise pollution can cause temporary hearing loss. This temporary loss is known as temporary hearing threshold shift, and it is normally correct 16 to 48 hours after the end of exposure.

Hearing loss can be permanent, if the concerned tone is loud enough to damage or destroy the delicate inner ear cells, called cilia, or stereocilia, in the cochlea of the inner ear. Cilia These cells respond to mechanical vibrations, sound by an electrical signal to the auditory nerve. The mechanism of injury to cilia is purely physical; excessive vibration results in microscopic tearing or breaking of the cilia. There are many cilia lies in the cochlea of the ear, the more than damaged, the more profound deafness. Once cilia cells are chemically or physically damaged or destroyed, they will not repair or regenerate.

Protect your hearing

A general recommendation on the prevention of hearing loss due to loud noises is to either wear ear protection or remove yourself from the source.

Use either ear plugs, earmuffs or other protective devices when they noises over 85 dB. Since one can not always be sure if your healthy environment places you in danger, use this rule of thumb: If you are in conversation with someone three away from you, and you can hear what is not clear is, the noise level around you around could be damaging your hearing.

Are the obvious and simply walk away when sounds are too loud or turn down the volume of the source, if possible. It is also possible that the intensity of sound was not directly near the source. The time in a noisy environment is important for the health of your hearing, limiting the time that your ears to loud noises. Cover your ears with your hands or cross the street when you hear someone running a leaf blower or, if you are in the vicinity of a jackhammer.

Tinnitus treatment Institute

Since NIHL, noise or hearing loss, tinnitus can lead to injury of cochlear ciliary cells that tinnitus therapy institute has a great interest in the prevention of injuries caused by a solid exposure. Prevention is always better than treatment. For more information on tinnitus and NIHL, visit the website tinnitus therapy Institute.

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