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Acoustics
Speaker–wall cancellation
Estimate the first cancellation caused by a reflection from the wall behind a speaker.
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The calculation
Extra path length ≈ 2d First cancellation frequency ≈ c / (4d) Delay ≈ 2d / c; c = 343 m/s
Assumptions & limits
Listener in front of the speaker along the wall normal, with a strong reflection. This simplified geometry does not predict notch depth or all room reflections.
Background: Monitor placement · Genelec
