Active noise cancellation dominates below 1 kHz while passive isolation takes over above it
Related
- Amounts of masking are expressed as dB differences, not absolute dB SPL levels. (similarity 0.82)
- Dissonance depends on proportional separation falling inside the critical bandwidth, not absolute frequency difference (similarity 0.82)
- Active noise cancellation works by adding phase-reversed copies of background noise (similarity 0.82)
- Critical band bandwidths grow from 100 Hz to over 2 kHz with frequency (similarity 0.81)
- Filtering a signal to narrow its bandwidth necessarily spreads it in time. (similarity 0.81)
- High ambient noise forces listeners to raise volume toward hearing-loss levels (similarity 0.81)
- Passive noise cancellation avoids contaminating the wanted signal that active cancellation risks (similarity 0.81)
- Speech reception thresholds plateau beyond a target low-pass attenuation floor (similarity 0.80)
- A 1 dB detection gain can shift speech identification by 15 to 20 points (similarity 0.80)
- 1970s hi-fi loudness controls compensated for low-level hearing loss but were flawed (similarity 0.80)
- Each open-end reflection filters out high frequencies until the fundamental remains (similarity 0.80)
- Auditory sensitivity varies nonuniformly across the frequency range (similarity 0.79)
- Neutral near-field monitors make sound quality translation to consumer systems predictable. (similarity 0.79)
- Standing waves occur at all multiples of the lowest resonant frequency (similarity 0.79)
- Noise loudness is level-independent until bandwidth exceeds the critical bandwidth. (similarity 0.79)