The mobile phone edition " The ring tones that the mosquito lets " Decrease hearing

The mobile phone edition " The ring tones that the mosquito lets " Decrease hearing
The mobile phone edition " The ring tones that the mosquito lets " Decrease hearing
Cub reporter Yang JieSong of this newspaper "What I used is the advanced ring tones, teachers can not hear! " Recently, a kind of " magical " has arisen in some students in middle and primary schools popularly High-frequency ring tones. It is said, this kind of ring tones is the ring tones which the teacher can not hear, silent ring tones, can download in a lot of websites. The expert is anxious, such high-frequency ring tones is a noise, long term administration will damage teenagers' hearing. The teacher parents can not hear the reporter searching for finding, this kind of frequency of ring tones that can download in a lot of websites is more than 14000 hertzs on the net, some even exceed 17000 hertzs. The net friend says, the adult generally over 30 can not hear this kind of ring tones, but teenagers can hear. So, a lot of students download these kind of ring tones, having a class will not be perceived to receive and dispatch messages by the teacher. A middle school teacher talks about in the forum, while having a class some time, she confiscates a classmate's mobile phone, put on the lecture platform. Later on classmates say in the class the ring tones is disturbed very much, let her shut off the mobile phone, but she has not heard any sound. Looked over the mobile phone later, found that had not really received the incoming telegram, but what this classmate's mobile phone was used was the high-frequency ring tones. It is reported, such high-frequency ring tones appears first in Britain, original intention is to help shopkeeper to disperse the young people that gathered at the gate, make adult receive interference while, develop into the intersection of mobile phone and edition later " the mosquito called the ring tones " ,Prevail in American-European teenagers gradually. Reporter some middle schools in Beijing know, the school does not allow students to have a class and turn on the mobile phone, if hear the ringing sound of cell phone, teachers will confiscate the mobile phone. Ask when students know this kind of ring tones, most students say that know, but users do not have many. A classmate says: "I use the ring tones, listen to uncomfortable, dizzy to feel sick, use later. " The high-frequency sound perceives different reporters and tries to download several high-frequency rings tones, some are rhythmical, it sounds as if that looks like the noise when the radio changes the platform; Some do not have rhythm, the sound like mosquito cry or electric current. After wearing the earphone and hearing for several seconds, the reporter feels headache is dizzy, unset. Give colleague, friend around and hear this ring tones, find the young colleagues can all hear, and say the sound is ear-piercing, but the older colleague does not feel at all. The experiment reveals, listen to the heart electric pictures, brain waves of short time of experimenter of this kind of ring tones having a strong change. Some classmates say too while interviewing, use out of curiosity at the beginning, but because feel so uncomfortable as to no longer use after hearing. Cheng MingKun, researcher of Ins of acoustics,Academia Sinica, tells reporters, the principle of this kind of ring tones is uncomplicated, mainly relate to sensitivity of the ears of people. People can hear the range of the sound generally divides the sound frequency into high frequency, intermediate frequency and 3 frequency bands of low frequency among 20 hertz 20000 hertz with ear. The sound frequency which the adult with good sense of hearing can hear is often among 30 hertz 16000 hertz, the elderly are between 50 hertz 10000 hertz. Increase with age, the mankind will drop the sensitivity of the high-frequency voice gradually. Often contact the person of the noise, the decline time of sensitivity will be earlier, the intensity is more obvious too. Cheng MingKun introduces, such high-frequency ring tones has exactly utilized the characteristic of adult's high-frequency wave band sensitivity decline. But this kind of ring tones is very tall in frequency, even if young people can hear, need more strenuously and gathering, so it is tired to produce the sense of hearing, will cause the physiological response such as being dizzy, sick, agitated. Often listen to high frequency diminishing researcher of Chinese deaf children recovering center Ge XiaoHui of hearing to think, often listen to the sound of high frequency, will accelerate teenagers' high-frequency compass and decline, perhaps the serious one causes influence on the study and life. " V " appears in the impact on people's hearing of the noise The downward trend of shape, most sensitive 1000 hertzs are easiest to damage in 4000 hertzs of ranges. If in high-frequency sound sensitivity decline of more than 10,000 hertzs, will make all hearing ranges drop; Most sensitive 1000 hertzs are 4000 hertzs of wave bands, the fall of the sensitivity will be more serious. The serious one may enable children to " zh " , " z " , " sh " Wait for consonants not to hear or catch, perceive strength and drop to the plosive, fricative in English. Ge XiaoHui is anxious, some children have not realized it was oneself sense of hearing that went wrong, especially study foreign language, the problem of sense of hearing will influence children to pronounce seriously. So, Ge XiaoHui reminds, teenagers should be far away from the high-frequency ring tones; Once parents find the child studies very hard but the achievement can not go up, after getting rid of the intelligence factor, should consider whether there is influence factor of hearing.


|