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AV Calculators & Resources

Sound, design and lens calculators designed to simplify those complex equations

SOUND SYSTEM DESIGN TOOLS
These calculators take the uncertainty out of equations common to designing an acoustically reliable sound system.

Constant Voltage Transformer Power Delivered
www.crownaudio.com/apps_htm/designtools/cv-xform-pwr.htm

dB Power Ratio
www.crownaudio.com/apps_htm/designtools/db-power.htm

dB Voltage Ratio
www.crownaudio.com/apps_htm/designtools/db-volts.htm

Amplifier Power Required
www.crownaudio.com/apps_htm/designtools/elect-pwr-req.htm

Inverse Square Law
www.crownaudio.com/apps_htm/designtools/inverse-square-law.htm

Line Loss
www.crownaudio.com/apps_htm/designtools/line-loss.htm

Ohm's Law/Watt's Law
http://ourworld.compuserve.com/homepages/Bill_Bowden/ohmslaw.htm

Wavelength Calculator
www.mcsquared.com/wavelength.htm

Speech Intelligibility
www.mcsquared.com/ssdesign.htm

Critical Distance
www.mcsquared.com/critical.htm

Quickie Reverb Time Calculator
www.mcsquared.com/rt60aa.htm

Constant Voltage Calculator
Click the link below to access this calculator from NSCA and Pro AV's "Constant Voltage Loudspeaker Systems" Tech Tutorial.
www.proavmagazine.com/flash/CVCalc.xls



DISPLAY SYSTEM DESIGN TOOLS

The following calculators provide information for selecting the best products for display system design, and are handy for any presentation application.

Selecting Front Projection Screens
www.da-lite.com/education/guide.php?page=10

Viewing Distance vs. Screen Size
www.mcsquared.com/images1.htm#size

TCO Calculator
http://www.necdisplay.com/solutions/tco/nec_tco.htm

Projector Calculator
www.nectechmedia.com/throw/throw.htm



LENS CALCULATORS

These calculators simplify the process of determining the correct lens for many applications, and can provide the information you need with a minimum of known variables. These calculators are helpful for any surveillance, network video, IMAG, or CCTV application.

Object Dimension, Object Distance, Focal Length
www.canon.com/bctv/calculator/calculator3.html

Angle of View
www.canon.com/bctv/calculator/calculator1.html

Depth of Field
www.canon.com/bctv/calculator/calculator2.html



REFERENCES

U.S. Frequency Allocations
Click here to access the National Telecommunication and Information Administration's United States Frequency Allocations table referenced in the July 2006 "Frequency Selection" Cheat Sheet.


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