Find the standing-wave frequencies where sound will peak or howl.
Sound bouncing between parallel surfaces builds up at half-wavelength spacings, and those exact frequencies are prone to howl. Locating the feedback peaks for a given mic-to-speaker gap lets you notch or damp the problem frequencies in advance.
Feedback Frequency
Fundamental = speed of sound / (2 x distance)
Fundamental = speed of sound / (2 x distance) Sound bouncing between parallel surfaces builds up at half-wavelength spacings, and those exact frequencies are prone to howl.
Locating the feedback peaks for a given mic-to-speaker gap lets you notch or damp the problem frequencies in advance.
This calculator takes 1 input: Distance between surfaces. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.