Binaural detection benefits are modeled as noise-floor reduction in each frequency band.
Evidence
The underlying assumption of their model is that a BMLD effect acts within each frequency band, leading to a within-band detection advantage. This was modeled as a reduction of the level of the noise floor equal in size to the BMLD for that particular frequency, resulting in a more advantageous signal-to-noise ratio (SNR). This would make previously undetectable speech elements audible and enable them to contribute to speech intelligibility. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1620
Categorization
Category: Definitional Content
- DEFINE: Explains the Levitt-Rabiner BMLD model’s mechanism of within-band SNR improvement.
- XREF: Connects to informational masking vs energetic masking and speech-in-noise models like the extended speech intelligibility index.
Related
- Binaural advantage is modeled as a within-band noise-floor reduction improving SNR (similarity 0.93)
- Binaural masking release is modeled as within-band noise floor reduction (similarity 0.92)
- Binaural release of masking acts on spectro-temporal units, not frequency channels (similarity 0.88)
- BMLD detection advantages may operate at spectro-temporal unit level, not just per frequency band. (similarity 0.87)
- Binaural detection advantages act on small spectro-temporal units, not whole frequency bands (similarity 0.86)
- For speech interferers, BMLD unmasking acts within spectro-temporal units rather than frequency bands (similarity 0.84)
- Speech elements near masked threshold carry intelligibility only under binaural listening. (similarity 0.82)
- Reversing a tone’s phase in one ear lowers its detection threshold in noise (similarity 0.82)
- Spatially separated speech sources improve intelligibility through binaural release from masking. (similarity 0.81)
- Spatially separated sources reveal speech components audible only via binaural processing (similarity 0.81)
- Separating signal from masker locations improves detection through two binaural effects (similarity 0.81)
- A 1 dB detection gain can shift speech identification by 15 to 20 points (similarity 0.80)
- Binaural intelligibility level difference measures speech unmasking benefit (similarity 0.80)
- Discarding low-SNR speech components affects binaural intelligibility (similarity 0.80)
- Binaural masking-level difference measures hearing improvement from interaural stimulus asymmetries (similarity 0.79)