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[DOC File]ORDINANCE NO - San Diego County, California
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(E) The volume of sound does not exceed a sound level of 65 decibels (on the "A" scale) at a distance of 50 feet from the sound amplifying equipment as measured by a sound level meter. (F) No sound amplifying equipment is operated unless the axis of the center of the sound reproducing equipment is parallel to the direction of travel of the ...
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[DOCX File]2 - Escondido
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The human ear perceives a 10 dB increase in sound level as a doubling of the sound level (i.e., 65 dBA sounds twice as loud as 55 dBA to a human ear). An individual’s noise exposure occurs over a period of time; however, noise level is a measure of noise at a given instant in time.
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[DOC File]JJWhite Letterhead 072913
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The Human is extremely sensitive to sound. Any noise over 85 decibels can cause irreversible hearing damage. This is why ear safety is so important. Just to give you a real life example a lawn mower is usually around 90 decibels when it is running. So even long exposure to one can cause damage. Protective Ear Safety Equipment
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[DOC File]California Courts
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The general plan’s limit for both residential areas and open space preserves is a day-night average sound level of 55 decibels (dB). Santa Cruz County’s General Plan provides that, between 7:00 a.m. and 10:00 p.m., exterior noise levels are not to exceed 70 dBA or an hourly average of 50 dBA.
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[DOC File]Running head: STUDENTS WITH HEARING LOSS
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About a third of the children with hearing loss rest somewhere in the moderate hearing loss group, experiencing a loss of between 40 and 55 decibels. This category has significant trouble understanding speech, and making sounds (because people with no hearing loss learn to form their own voice by hearing how they make sounds) to communicate ...
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[DOC File]HOW CAN I TELL IF I HAVE A HEARING LOSS
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How can I tell if the music IS too loud? Sound intensity is measured in decibels (dB). Unfortunately IPODs, walkmans and stereos don’t often display sound levels in decibels. Damaging sound levels start above 84dB and are dependent on the length of time you are exposed. As sound gets louder, safe exposure time gets shorter.
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[DOCX File]M21-1III_iv_4_SecB - Veterans Affairs
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the puretone threshold at each of the four specified frequencies (1000, 2000, 3000, and 4000 Hz) is 55 decibels or more, or. the puretone threshold is 30 decibels or less at 1000 Hz and 70 decibels or more at 2000 Hz. When an exceptional pattern of hearing impairment is shown, the Rating Veterans Service Representative (RVSR) will determine the ...
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[DOC File]Semper Safe - United States Marine Corps
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Hazardous noise as defined by the Marine Corps is “Exposure to any steady state noise that exceeds 84 decibels (dB) regardless of duration and exposure to impulse or impact sound pressure levels equal to or greater than 140 decibels.” So just how loud is 84 dB.
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[DOCX File]Sound Intensity .gov
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Sound levels are measured in units of decibels (dB) which like the magnitude units used by astronomers to describe star brightness, is a logarithmic unit of sound power through a surface. dB = 10Log 10 (P1/P0) where P0 is a reference power level of 1 picoWatt (10-12 watts).
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How loud is 55 decibels