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Century Audio Visual - Be Tech Savvy

Be Tech Savvy #40

Century AV - Saturday, September 01, 2012

Keep yourself updated; Be Tech Savvy with a little help from

Century Audio Visual

Audio Visual Technology "News of Interest" #40 – Sept. 1, 2012 

(continued from last 2 issues)

Regulations on Mass Notification Systems are Coming to Canada*

”Speech Intelligibility Speaker Specifications & Considerations”:

Dispersion Angle: Focused sound requires a speaker that has narrow dispersion angles defined by the 6dB attenuation point of the speaker when measured from the on axis response to the point off axis where the sound drops 6dB. This point determines the actual coverage pattern of the speaker in the horizontal and vertical axis. With narrow dispersion angles, the sound is directed to the audience plane and very little energy is directed towards the walls and ceilings. This helps reduce the excitation of the reverberant field and reduces the delayed reflections. Knowing this dispersion angle allows for proper speaker placement because we will match or overlap at these points.

Sensitivity: This figure expressed as 1 watt at 1 meter, (1W/1M) basically states that if the speaker receives one watt of power that the speaker will produce a certain amount of Sound Pressure (expressed in dB) at one meter away from the speaker on axis. The higher this figure, the less total wattage required in the total speaker load. Figures such as 90 dB and higher are the desirable values for this specification.

Max Power: How much final SPL (sound pressure level) is the speaker capable of? Determine the final SPL required at the audience plane and then check the Max Power Handling to see if after distance calculations, the required SPL can be achieved.

Doubling Power and Distance: As power is increased by a factor of two (double, 3 watts to 6 watts etc.) the SPL will increase by 3dB for every doubling. When doubling the distance from the one meter reference point, conventional single cone speakers will lose 6dB for every doubling. For line arrays this loss is less and can be approximately 3dB.

*Article reprinted from the TOA Canada Newsletter "


Thank you ‘Mississauga Business Times’ readers, for again voting Century AV as a “Top Performer” for AV Services. We achieved Silver status previously and Gold again in 2011. This year, we have earned the status of #1 as PLATINUM. We are proud of our client service relationship and encourage you to give the ‘Mississauga Business Times’ a read. Thanks for voting Century AV as your choice of the best AV Services Company in town!


Century AV is pleased to announce the recent return of Danny Fraga who had been living overseas for the last 2 years. His 7 years of previous experience with our client Rental AV Events has positioned Danny to enhance the Century AV commitment of Excellence in Presentation Technology. Also, here’s a helpful tool that has amazed our client’s with its simplicity in event planning: - our “AV Rental Quote Request Form” on our web site “24/7” to service your AV rental needs.

Be Tech Savvy

Visit our new website at for information on Sales, Installation, Rental & Staging. Call us at 905-275-6010; the number clients have been calling for Integrated AV Technology for over 30 years. Follow us on Facebook and Twitter for updates and other useful information!

Thanks for being a Century Audio Visual customer!

It is our privilege to service all your audio visual needs!

Please look for our next issue - #41 Oct.1, 2012 and... “Be Tech Savvy”


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