Hey all, I'm trying to understand the significance of free air frequency, and doing a test to measure it for a speaker. I found this sample "test" online, but I need a bit of clarification it says:
Hold up or suspend the woofer away from all nearby surfaces. Sweep the frequency on the sine wave geneator down, watching the AC voltage reading across the resistor with the multimeter. Sweep all the way down to zero and back up. At the frequency where you get the lowest voltage reading, you have the highest speaker impedance. Note the frequency on the sine wave generator: that is your free air resonance frequency.
why does it say the lowest voltage represents resonance. I don't understand that whatsoever, and I can't seem to find any links as to the physics/electrical understanding of it.
Thanks in advance!
Hold up or suspend the woofer away from all nearby surfaces. Sweep the frequency on the sine wave geneator down, watching the AC voltage reading across the resistor with the multimeter. Sweep all the way down to zero and back up. At the frequency where you get the lowest voltage reading, you have the highest speaker impedance. Note the frequency on the sine wave generator: that is your free air resonance frequency.
why does it say the lowest voltage represents resonance. I don't understand that whatsoever, and I can't seem to find any links as to the physics/electrical understanding of it.
Thanks in advance!