Resource to calculate, building and measuring Hi Fi Loudspeakers and more...




 
Friday, May 26, 2017
3117 users online


Bookmark and Share


Back to overview

"Lobing" between two spherical wavefronts (something like loudspeaker) occurs when they are greater than 1/4 wavelength apart.

  • Below this, they "sum" acoustically, as if they were a single source with double the output.

  • Above this, destructive interference gets gradually worse as you rise in frequency,
       or lower (size of) wavelength. There is some summation and some destruction.



  • Most listeners say they don't notice any loss of uppermost octave info when listening to the 1/2 wavelength method.

      Calculate Frequency for given Distance

     
    Distance between Chassis ( center - center ):  cm
     
     
    1/2 wave method = Hz
    1/4 wave method = Hz
     



      Calculate Distance for given Frequency

     
    Crossover Frequency: Hz
     
     
    1/2 wave method = cm ( center - center )
    1/4 wave method = cm ( center - center )
     




    Have also a look here:
    Wavelength - Frequency Calculator
    Baffle Diffraction Loss