Transcript Teacher Resource 1 Sound Level Measurement PowerPoint

SOUND LEVEL
MEASUREMENT
GUITAR CLASS RESULTS
LOW SOUND LEVELS
0 – 79
Include your class results here
MODERATE SOUND LEVELS
80-84
Include your class results here
HIGH SOUND LEVELS
86 – 94
Include your class results here
REALLY HIGH SOUND LEVELS
96+
Include your class results here
WATCH YOUR EARS FACT
SHEET
DANGER FACTORS
INTENSITY: the louder the noise the greater the
damage
FREQUENCY: higher frequency (pitch) sounds create
more damage
TIME: the longer the time the greate the damage
accumulative recommended daily maximum = 15
minutes @85 db
PROXIMITY: the closer the noise the greater the
damage
PERSONAL EXPOSURE HISTORY: is accumulated
over a lifetime
WATCH YOUR EARS
WARNING SIGNS
You have to shout to make yourself heard over
background noise/music
Ringing in the ears – indication of over exposure
after the event is a serious warning
Tinnitus – permanent ringing in the ears & hearing
loss
WATCH YOUR EARS
MISCONCEPTIONS
“It doesn’t hurt, so it’s not damaging my ears!”– our
hearing adjusts to the situation by reducing the signals
to the brain but the damage is still being done.
“It’s only for a little while” – sound levels of 115 db (rock
concerts) can damage hearing in as little as 15 minutes.
“I’ve been listening like this for years & have no
problems” - the effect is cumulative – it will catch up
to you!!
SUMMARY DATA
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Threshold of hearing
Normal breathing
Whisper at 2 meters
2-person conversation at 2 meters
Vacuum cleaner
Passing subway train – platform
Pneumatic chisel breaking concrete
0 db (decibels)
10 db
20 db
60 db
80 db
90 db
110 db
SUMMARY DATA
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Rock group
Propeller plane taking off
Threshold of pain
Military jet taking off
Space shuttle launch 1 km away
Instant perforation of ear drum
120 db
120 db
130 db
140 db
160 db
165 db
CHECKING THE SOUND OF
YOUR PERSONAL LISTENING
DEVICE
Take out your mp3, iPod or other personal listening
device.
Find a musical selection that you enjoy … turn the
volume up as if you were riding on the bus listening to
it to pass the time.
Press pause … bring your listening device into the
practice room (or similar quiet location) for me to
check the sound level of your device.
Results will be posted upon completion of the exercise.
CHECKING THE SOUND OF
YOUR PERSONAL LISTENING
DEVICE
CLASS RESULTS
Enter your class results here
WATCH YOUR EARS
Protect Yourself!!!!
Listen at safe levels .
Use appropriate EAR PROTECTION.