Hearing-impaired listeners experience a steeper loudness-growth function known as recruitment

Evidence

Recruitment describes the effect in regions in which threshold in quiet is elevated by an impairment to higher values (normally 30 to 60 dB), v!Thereby loudness increases much more quickly as a function of increasing level. For example, 40 dB above the elevated threshold, the loudness sensation of the hearingimpaired listener is almost the same as the loudness sensation of normally hearing subjects. This means that the loudness function, i.e. loudness as a function of the level of a tone, is much steeper in such subjects than for normally hearing subjects. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1959

Categorization

Category: Definitional Content

• DEFINE: Defines recruitment as elevated threshold plus accelerated loudness growth.

Related

• In hearing-impaired regions loudness grows far faster with level (similarity 0.91)
• Hearing-impaired patients with loudness recruitment could disentangle intensity and loudness encoding. (similarity 0.89)
• Recruitment can explain why loudness summation is absent in noise-induced hearing loss (similarity 0.89)
• Loudness recruitment shrinks dynamic range while preserving overall loudness (similarity 0.87)
• The full loudness range squeezes into a smaller dynamic range for impaired listeners. (similarity 0.87)
• Loudness-growth slope increases with hearing-loss degree but resists exact prediction (similarity 0.87)
• Recruitment means steep loudness growth that catches up to normal at high levels (similarity 0.86)
• Recruitment makes loudness grow faster in impaired ears than normal ears. (similarity 0.85)
• Loudness recruitment in impaired listeners could reveal how cortex encodes perceived level (similarity 0.85)
• Hearing-impaired specific loudness jumps to near-normal values 20 dB above threshold (similarity 0.85)
• Understanding loudness’s neural basis could improve recruitment treatment (similarity 0.85)
• Recruitment patients could disambiguate loudness from intensity encoding in fMRI (similarity 0.85)
• Sensorineural hearing loss produces rapid loudness growth while discomfort thresholds stay normal (similarity 0.85)
• Conductive and cochlear losses produce different loudness growth patterns (similarity 0.84)
• Sensorineural hearing loss causes abnormal rapid loudness growth called recruitment (similarity 0.84)

Broader Connections

• Loudness recruitment shrinks dynamic range while preserving overall loudness #expands (0.92)
• Loudness growth mirrors basilar membrane input-output functions #expands (0.90)
• Loudness-growth slope increases with hearing-loss degree but resists exact prediction #expands (0.88)
• Recruitment can explain why loudness summation is absent in noise-induced hearing loss #expands (0.85) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1960
• Conductive and cochlear losses produce different loudness growth patterns #responds-to (0.85)
• Hearing-impaired patients with loudness recruitment could disentangle intensity and loudness encoding. #responds-to (0.82)
• Presbyacusis shows frequency-dependent recruitment strongest at high frequencies #qualifies (0.80)