projector noise - barco webinar 16 04-2015
TRANSCRIPT
Noise and projectorsKoen Van Belle
9 Apr 2015 Webinar
What is sound?
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NOISEunwanted sound
SOUNDvibration of a medium, like air or water
TONE of a soundFrequency of vibration
(20Hz to 20.000Hz)
LOUDNESSAmplitude of the vibration
Hearing = Pressure changes on your ear drum
Non linear behaviour
Measuring noise – dB scale - logarithmic
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Huge dynamicrange!
Working with dB’s
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You hear it twiceas loud Double pressure
on your ear drum
Human hearing is depending on age
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From: ‘Modern Sound Reproduction’ by Harry F. Olson
Noise is depending on the distance from the source
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-6dB -6dB
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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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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Barco PGWU-62L – Quietest projector
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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
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
