Masked speech thresholds are measured as the target-to-masker ratio yielding 50 percent correct

Evidence

To estimate masked thresholds (target-to-masker ratio, TMR, giving 50 % correct), the levels of the two masking sentences were adjusted relative to the level of the target sentences using a one-up/one-down adaptive tracking algorithm. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1730

In the first experiment the target sentences were fixed at either 19.5 dB SL (low SL condition) or 39.5 dB SL (high SL condition) above each participant’s speech reception threshold (SRT) in quiet. To estimate masked thresholds (target-to-masker ratio, TMR, giving 50 % correct), the levels of the two masking sentences were adjusted relative to the level of the target sentences using a one-up/one-down adaptive tracking algorithm. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1721

Categorization

• DEFINE: Defines TMR operationally: the ratio at which a listener achieves 50% correct in adaptive tracking.
• corroborated: 3 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 1730; Dijk, Pim van, Physiology, Psychoacoustics and…, 1721
• XREF: connects to: Auditory thresholds are measured by adaptive level bracketing with a 50 percent response criterion. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2343