Delay and polarity inversion together shift the frequencies of cancellation.
Related
- A time delay of a reflection imprints a comb of enhanced and suppressed frequencies (similarity 0.81)
- Delays too short for echoes still audibly alter timbre through spectral combs (similarity 0.78)
- Active noise cancellation dominates below 1 kHz while passive isolation takes over above it (similarity 0.78)