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vrijdag 18 mei 2012
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    Calculating Vent Air Speed



This calculator is intended to help you determine the speed of the air in a port.

This will help you decide if a particular port is too small for your application, which will cause noise at high volume levels.

This calculator is not intended for use on bandpass designs.

  
 

A general rule regarding port air speed is to try to keep it 10 percent or less of the speed of sound.

[ <= 34.2 meters ]


  
  Explanation of Terms:

  
  W is the acoustic power output of the speaker in Watts.

You can calculate this by multiplying the reference efficiency times the power handling of the speaker.

Fb is the tuning frequency of the enclosure.

R is the radius of the port.

Mach is the speed of sound in air (342 m/sec).

 		  
 
W acoustic power :



Fb tuning frequency of the enclosure :

 Hz
R radius of the port. :

 cm


Mach  %     Meters  per second




Click here to calculate the Driver Reference Efficiency
        
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