Just-noticeable interaural delay is about 50 microseconds below 1.5 kHz

Evidence

The model assumes devices or channels that are tuned to particular interaural delays. These devices, which exist only for frequencies below 1500 Hz, are assumed to be arrays of channels each tuned to a different characteristic interaural delay. Each channel then acts as an interaural delay filter. It transmits whatever signal arrives at its characteristic delay without attenuation, but attenuates more and more those signals that arrive with delays that are increasingly different from the characteristic delay of the channel. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1680 (#corroborates, via linked claim)

By comparing the timing and intensity of a sound at each ear, listeners can locate its source on the horizontal plane, and exploit these differences to hear out signals in background noise—an important component of ‘cocktail party listening’. Sensitivity to interaural time differences (ITDs) in particular has received much attention, due in part to the exquisite temporal performance observed; for sound frequencies lower than about 1.3 kHz, ITDs of just a few tens of microseconds are discriminable, observed both at the neural and behavioural levels. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2949 (#expands, via linked claim)

Categorization

• corroborated: 2 independent passages support this claim
• XREF: connects to: Interaural-delay-tuned channels exist only for frequencies below 1500 Hz — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1680; Interaural time differences are only usable below about 1500 Hz; Humans can detect interaural timing differences as small as ten to twenty microseconds — Dijk, Pim van, Physiology, Psychoacoustics and…, 2949 (+1 more)

Related

• Humans can detect interaural timing differences as small as ten to twenty microseconds (similarity 0.91)
• The ear detects binaural delays finer than individual neuron timing supports (similarity 0.91)
• Interaural-delay-tuned channels exist only for frequencies below 1500 Hz (similarity 0.89)
• Group delay audibility threshold is 1.6 to 2 milliseconds (similarity 0.86)
• Listeners can discriminate interaural time differences of just tens of microseconds below 1.3 kHz. (similarity 0.86)
• Only harmonics separated by more than the ear’s critical bandwidth are resolved (similarity 0.84)
• The brain measures interaural delay via coincidence-detector neurons and delay-line axons (similarity 0.83)
• Interaural time difference maps derive from precise phase delays, not absolute latencies (similarity 0.83)
• Click stimuli achieve neural timing precision of about twenty microseconds (similarity 0.82)
• Interaural phase differences can produce time-delay sensations measured at threshold. (similarity 0.81)
• Audible stereo-bass spatial effects occur mainly above 80 Hz (similarity 0.81)
• Directional hearing rests on interaural time and intensity differences. (similarity 0.81)
• Ears detect direction changes as small as 5 degrees via 50-microsecond delays (similarity 0.80)
• Headphones allow separating interaural phase from interaural time delay (similarity 0.80)
• Interaural level differences and time shifts trade off to cancel each other (similarity 0.79)

Broader Connections

• Interaural-delay-tuned channels exist only for frequencies below 1500 Hz #corroborates (0.92) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1680
• Interaural time differences are only usable below about 1500 Hz #corroborates (0.88)
• Humans can detect interaural timing differences as small as ten to twenty microseconds #expands (0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2949
• The brain measures interaural delay via coincidence-detector neurons and delay-line axons #expands (0.75)