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Velodyne vFree On-Ear Manual

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Sound Noise Level (dB) Effect
Normal breathing 10 Just audible
Whisper 30 Very quiet
Normal conversation 50-65 Comfortable hearing levels are under
60 dB
Vacuum cleaner, hair dryer 70 Intrusive; interferes with telephone
conversation
Average city trafc 80 Annoying; interferes with conversation;
constant exposure may cause damage
Lawnmower, food blender 85-90 85 dB is the level at which hearing
damage (8 hrs) begins
Garbage truck, cement mixer 100 No more than 15 minutes of unprotected
exposure recommended for sounds
between 90-100 dB
Stereos (over 100 watts), thunderclap
(near)
110-125 Regular exposure to sound over 100
dB of more than one minute risks
permanent hearing loss
Jet engines (near) 140 Threshold of pain begins around 125 dB
*Information obtained from http://www.nidcd.nih.gov/health/education/teachers/pages/common_sounds.aspx
Please listen safely
For trafc safety, do not use vFree headphones while driving or cycling. Do not wear vFree headphones
while operating machinery. Adhere to local laws regarding the use of headphones.
Listening with vFree headphones at high volumes may affect your hearing, including causing permanent
damage. Ringing in your ears or other discomfort can indicate that the volume is too high.
Hearing health is critical to enjoyment and the quality of life. Protect your hearing by listening with
your vFree headphones in a responsible manner that protects your long term hearing health. Velodyne
Acoustics, Inc. is not responsible for hearing loss or damage resulting from the use of this product.
Cleaning
Ear cups should be cleaned regularly for sanitary reasons and to prolong the life of your ear cups.
With a dry cloth or paper towel, thoroughly clean the ear cups.
Do not get the speakers or electronics inside of your headphones
wet. Liquids and heavy moisture can cause damage to the
electronics inside your headphones. Such accidental damages
are not covered under warranty.
vFree user’s guide
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