09-04-2010, 20:56
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חבר מתאריך: 15.07.04
הודעות: 3,236
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בתגובה להודעה מספר 1 שנכתבה על ידי I WANT A CAR שמתחילה ב "רעש מפזר חום -האם מזיק לשמיעה לאורך זמן?"
ציטוט:
Sound is measured in units called decibels. On the decibel scale, an increase of 10 means that a sound is 10 times more intense, or powerful. To your ears, it sounds twice as loud. The humming of a refrigerator is 45 decibels, normal conversation is approximately 60 decibels, and the noise from heavy city traffic can reach 85 decibels. Sources of noise that can cause NIHL include motorcycles, firecrackers, and small firearms, all emitting sounds from 120 to 150 decibels. Long or repeated exposure to sounds at or above 85 decibels can cause hearing loss. The louder the sound, the shorter the time period before NIHL can occur. Sounds of less than 75 decibels, even after long exposure, are unlikely to cause hearing loss.
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http://www.nidcd.nih.gov/health/hea...oise.asp#sounds
אז... לא.
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