Noise is disturbing. Especially in meeting rooms, the sound created by the projector can take away too much focus from the participants. This presentations explains what noise is, why it's disturbing, and what you can do about it.
2. What is sound?
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NOISE
unwanted sound
SOUND
vibration of a medium, like air or water
TONE of a sound
Frequency of vibration
(20Hz to 20.000Hz)
LOUDNESS
Amplitude of the vibration
Hearing = Pressure changes on
your ear drum
Non linear behaviour
7. Noise and projectors
Cooling fans are moving air and thus creating noise
• Careful design of the projector and choice of fans determine the
produced noise
The dB value of a projector doesn’t say it all
• 50dB can be a quiet office or a normal conversation
annoying, unwanted pitches of sounds = noise
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8. Some tips to reduce the noise in your meeting room
Choose a projector with low noise
Keep a distance from the projector
Avoid reflection on hard surfaces
If you have a projector with filters,
clean them regularly
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10. Quietest Laser Projector
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Quietest in the
market
35dBA
32dBA in eco
No disturbing
frequencies
Barco
Quieter than any
of the
competitive
products
Competition
No disturbance
during
meetings or
events
Value
Barco PGWU-62L
11. PGWU-62L and PGWX-62L
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• Easy to use
remote control
and OSD
• Same Warranty
conditions
• Filter free
Present-P
• Throw range:
0.75 - 5.5:1
(5 lenses)
• Motorized
zoom/focus/shift
• +/- 100%
Vertical lens shift
Lenses
• WUXGA
(1920x1200)
• WXGA
(1280x800)
• Both 16:10
aspect ratio
Resolution
• 6.000 ANSI
lumens
• ISO 21118 norm
Brightness
• Laser Phosphor
Lightsource
• 20.000 hours
lifetime on laser
diodes
Laser
Unwanted sound: At one extreme users of public transport sometimes complain about the faint and tinny sounds emanating from the headphones or earbuds of somebody listening to a portable audio player; at the other the sound of very loud music, a jet engine at close quarters, etc. can cause permanent irreversible hearing damage
The human auditory system doesn’t respond to all frequencies equally. Some sounds are easy to hear even when they are faint, others must exert more pressure on our eardrums before we’ll notice them
50dB: for one person a quiet office, for another person, the normal conversation is disturbing the concentration
Logarithmic scale