Experts from the company dB Logic have started to let out ear-phones in which is advanced «jammers» loud sounds, — informs Technology Review.
Whole world audiobroad gulls already sound the alarm for a long time concerning that the population gradually begins stall. Besides noise environmental contamination, negative influence is rendered by a habit to listen to music in ear-phones no matter where: going along the street or going in for sports.
The company Know-how dB Logic consists in limiting loudness of playing of music at level in 85 dB as doctors recommend. Thus smoothly to suppress sounds ear-phones begin after several seconds of playing on limiting loudness.
The listener, according to inventors, will not feel discomfort from "fastening", as quality as the highest, and the lowest sounds, remains accurate. It is important also that as an energy source for "cap" audiosignals, instead of the battery serve.
Approximate cost of unprofitable ear-phones HP-100 will make $50, and intrachannel EP-100 — $35.
According to Bryan Fligora who heads branch diagnostic audiology the Boston children's hospital (USA), now the average American listens every week to music approximately 18 hours, and at some this figure reaches till 70 o'clock. And frequently loudness in a player is exposed on a maximum – 88-120 decibels. It is known that such noise publishes the plane engine on launch. According to the doctors, more or less comprehensible loudness makes 85 decibels.
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