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Headphones, make your ears more aging than your heart

More than 85 dB above the sound can beats headphones on sale be incorporated into the noise. In fact, many people can tolerate headphones for a long time playing more than 90 decibels of music and unaware. Buy headphones may wish to pick some external noise can prevent headphones, in order to reduce the noise caused by the environment and increase the volume of the attendant volume. A random survey of students at Purdue University in the United States shows that more and more people are standing on a young head with a pair of old ears - in academic terms, , The number of users with mild noise-induced hearing loss (NIHL: Noise-induced Hearing Loss) is increasing year by year.

What is noise hearing loss? In short, the ear is too long to bear a large beats earphones voice, and then a decline in hearing a disease. Hearing the decline was originally only the elderly patent, the reason why now become a commonplace of young people, Walkman and headphones I am afraid that escape!

Our ears can be roughly divided into three areas: the outer ear, the middle ear and the inner ear. One of the most closely related with the hearing is the three parts of the outer ear and the middle of the demarcation of the tympanic membrane, located in the middle ear of the small bone, and in the inner ear of the cochlea. A sound signal from the sound source issued by the external auditory canal to reach the tympanic membrane, the extremely thin and sensitive tympanic membrane can be transmitted to the acoustic vibration of small bone.

Listen to the small bone by the body of the three smallest bone composition: bone, anvil and stapes. The three bones are similar to a lever system: the bones are directly connected to the tympanic membrane, and the vibration of the tympanic membrane directly drives the whole movement of the small bone system and extends the vibration through a small opening (oval window) on the cochlea into a liquid Cochlea. The cochlea is responsible for the different frequency of hair cells will be transformed into microvolt-level electrical signals, through the nerve fibers to the electrical signal conduction to the brain's auditory nerve. Although the whole process is very complicated, but because of the arrangement of the ear processor, we do not feel any delay.

When for a long time in the high-decibel sound environment, the most direct damage is the inner ear, treble or noise continue to shock the turbulence of the liquid, so that hair cells due to excessive stimulation and death. An image of the metaphor is that when we "enjoy" more than 100 decibels of music, hair cells like the roller constantly rolling in the grass, slowly die. Over time, responsible for a certain band of hair cells damaged seriously, the hearing level of the band will be a sharp decline.

According to the US Occupational Safety and Health Administration, more than 85 dB of sound can be incorporated into the noise. In fact, many people can tolerate headphones for a long time playing more than 90 decibels of music and unaware. Many people like to listen to songs in the subway, bus or the more noisy environment, naturally the headset volume will be too large. In one study, the researchers found that when the ambient volume reached 65 dB, the subjects would choose to adjust the headphone volume to 82 dB to get better results. And when the ambient volume is higher, this number may also be higher. Over time, even in a quiet room, headset users will still set the volume to a far more than the actual needs of the standard.

Even more frightening is that playing the loud volume for a long time does not bring immediate pain. For the average person, headache, foot pain, ears do not hurt, why pay attention to it? In the vast majority of cases, noise hearing damage is caused by the accumulation of a long time caused by minor damage. Therefore, the proposed headset enthusiasts should master a "60-60 principle", which is internationally recognized as the protection of hearing methods. When listening to music, the volume should not exceed 60% of the maximum volume, continuous listening time not beats by dre more than 60 minutes. In this case the ear is relatively healthy.

Buy headphones may wish to pick some external cheap beats by dr dre noise can prevent headphones, in order to reduce the noise caused by the environment and increase the volume of the attendant volume. Headphones are best to choose the first wear, earbud headphones than the ear to the damage to small. Because the earbud headphones directly plug in the external auditory canal, the sound is not the source, are toward the tympanic membrane in the past, the sound was all received by the tympanic membrane, the damage to the hearing more. In general, hear the same volume of music, earbud headphones than the headset head volume 7-9 dB.