Binaural envelope-delay sensitivity drops once tone separation exceeds the critical band.

Evidence

A fifth method stems from binaural hearing. The localization of short impulses is used as an indication of the development of critical bands. Justnoticeable delay between the envelope of two tone bursts, somewhat different in frequency and each presented to one ear, is measured as a function of the frequency separation of the tone bursts. The hearing system is quite sensitive to envelope delay as long as the two tone bursts are of high frequency and of the same or of nearly the same frequency. The sensitivity decreases drastically as soon as the frequency difference between the two tone bursts becomes larger than the critical bandwidth. The results obtained in this way lead to critical frequency distances that are very close to those measured with the four methods mentioned above, at least where they can be measured. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 911

Categorization

• corroborated: 2 independent passages support this claim — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 911
• XREF: connects to: Interaural envelope timing responses weaken with rising carrier frequency and ear mismatch; Masking acts within critical bandwidths, leaving distant-frequency sounds unaffected — Eric J. Heller, Why You Hear What You Hear- An…, 2009; Aging degrades envelope-based binaural phase discrimination independent of hearing loss — Dijk, Pim van, Physiology, Psychoacoustics and…, 809 (+5 more)

Broader Connections

• Masking acts within critical bandwidths, leaving distant-frequency sounds unaffected #corroborates (0.80) — Eric J. Heller, Why You Hear What You Hear- An…, 2009
• Interaural envelope timing responses weaken with rising carrier frequency and ear mismatch #qualifies (0.78)
• Aging degrades envelope-based binaural phase discrimination independent of hearing loss #complicates (0.74) — Dijk, Pim van, Physiology, Psychoacoustics and…, 809