Projector noise - Barco Webinar 16 04-2015
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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.
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Projector noise - Barco Webinar 16 04-2015
- 1. Noise and projectors Koen Van Belle 9 Apr 2015 Webinar
- 2. What is sound? 2 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
- 3. Measuring noise – dB scale - logarithmic 3 Huge dynamic range!
- 4. Working with dB’s 4 You hear it twice as loud Double pressure on your ear drum
- 5. Human hearing is depending on age 5 From: ‘Modern Sound Reproduction’ by Harry F. Olson
- 6. Noise is depending on the distance from the source 6 -6dB -6dB
- 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 7
- 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 8
- 9. Barco PGWU-62L – Quietest projector 9
- 10. Quietest Laser Projector 10 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 11 • 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
- 12. 12 www.barco.com White paper on noise
Editor's Notes
- 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