The investigation explored effects of stimulus level on frequency discrimination of long- and short-duration pure tones by five subjects with normal hearing and seven with sensorineural hearing impairments. The performance of hearing impaired subjects was poorer than normal for 300-ms tones but not for 5-ms tones. (Author/DB)

Binaural loudness summation was measured using three different paradigms with 10 normally hearing and 20 bilaterally symmetrical high-frequency sensorineural hearing loss subjects. Binaural summation increased with presentation level using the loudness matching procedure, with values in the 6-10 dB range. Summation decreased with level using the…

The study was conducted to obtain information on test-retest differences in Articulation Indices (AI) when a clinical threshold-based method is used to calculate AI. Standard deviations were greatest when the AI was near 50 percent and were also dependent on the relationship of the hearing thresholds and speech spectrum. (Author/DB)