Auditory thresholds are measured by adaptive level bracketing with a 50 percent response criterion.

Evidence

1. reduce the level in 10 dB steps until the sound is not heard. 2. increase the level in 5 dB steps until the sound is heard. 3. repeat 1 and 2 until the subject responds at the same level at least 50% of the time, defined as two out of two, two out of three or two out of four responses. 4. record the threshold as the lowest level heard. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2343

Categorization

• QUESTION: How does this threshold algorithm for pure tones compare to modern adaptive staircase methods used in psychoacoustic research?
• XREF: connects to: Loudness equality between monaural and binaural stimuli is measured by bracketing two adaptive thresholds. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1536; Absolute hearing threshold is a statistical construct, defined at 50% detection probability. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 131; Speech reception thresholds are measured adaptively with listener self-scoring. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3549 (+3 more)

Broader Connections

• Absolute hearing threshold is a statistical construct, defined at 50% detection probability. #corroborates (0.94) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 131
• Masked speech thresholds are measured as the target-to-masker ratio yielding 50 percent correct #exemplifies (0.83) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1730
• Speech reception thresholds are measured adaptively with listener self-scoring. #expands (0.82) — Dijk, Pim van, Physiology, Psychoacoustics and…, 3549
• Speech masking thresholds are estimated adaptively by adjusting relative talker levels. #expands (0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1729
• Thresholds are measured by presenting many stimulus levels and fitting a psychometric function #complicates (0.80)
• Loudness equality between monaural and binaural stimuli is measured by bracketing two adaptive thresholds. #expands (0.78) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1536