KRK KNS 8400 Manual Do Proprietário
4
SAFETY LISTENING GUIDANCE
WARNING: LISTENING TO AUDIO AT EXCESSIVE VOLUMES CAN
CAUSE PERMANENT HEARING DAMAGE. USE AS LOW A VOLUME
AS POSSIBLE.
CAUSE PERMANENT HEARING DAMAGE. USE AS LOW A VOLUME
AS POSSIBLE.
Over exposure to excessive sound levels can damage your ears resulting
in permanent noise-induced hearing loss (NIHL). Please use the following
guidelines established by the Occupational Safety Health Administration
(OSHA) on maximum time exposure to sound pressure levels before
hearing damage occurs.
in permanent noise-induced hearing loss (NIHL). Please use the following
guidelines established by the Occupational Safety Health Administration
(OSHA) on maximum time exposure to sound pressure levels before
hearing damage occurs.
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
DANGER
RISK
SAFE
170
180
190
SPL(dB)
RELATIVE LEVEL
RISKS/ACTIONS
RISK OF WINDOWS BREAKING
JET ENGINE
(RISK OF PERMANENT HEARING DAMAGE - CONTINUOUS)
SPACE SHUTTLE LAUNCH
THEORETICAL LIMIT IN AIR
CYMBAL STRIKES / HIGH HATS
FULL SYMPHONY ORCHESTRA
JACK HAMMER AT 1m
BUSY ROAD TRAFFIC
QUIET OFFICE
QUIET RESIDENTIAL
CALM BREATHING
LEAVES RUSTLING
NORMAL OFFICE
HOME THEATRE / TV
PERSONAL AUDIO SYSTEMS
RECORDING STUDIO
87dB EXPOSURE LIMIT
85 dB UPPER EXPOSURE ACTION
80 dB LOWER EXPOSURE ACTION
140 dB PEAK EXPOSURE LIMIT
137dB PEAK UPPER EXPOSURE ACTION
137.5 dB = PAIN THRESHOLD (AVERAGE)
135 dB PEAK LOWER EXPOSURE ACTION
AUDITORY THRESHOLD
(RISK OF PERMANENT HEARING DAMAGE - PEAK)
LOUD CONCERT ROCK/ELECTRONIC
EMERGENCY SIREN
CANON FIRING
LISTENING DURATION GUIDANCE
120dB
115dB
110dB
110dB
105dB
100dB
100dB
95dB
90dB
90dB
Avoid or take reduction precautions
15 minutes
30 minutes
1 hour
2 hours
4 hours
8 hours (level dependant)
15 minutes
30 minutes
1 hour
2 hours
4 hours
8 hours (level dependant)