Modulation detection by normal and hearing-impaired listeners.

In five normally hearing subjects and seven subjects with damaged cochleas, detection thresholds for sinusoidal frequency modulation (FM) and amplitude modulation (AM) were measured using 1 s stimuli with a 500 Hz carrier frequency (Fc) at a 'comfortable' loudness (given by subject-dependent SPLs and SLs). The modulation frequency (Fmod) was 2 Hz or 10 Hz. FM (but not AM) detection was poorer in the hearing-impaired group, especially when the hearing loss at Fc exceeded 50 dB. Fmod had a different effect on FM and AM detection. The corresponding interaction was essentially identical for the two groups of subjects. Previous studies strongly suggested that normal listeners use mainly neural phase-locking cues for the detection of FM when Fmod = 2 Hz, but mainly tonotopic cues when Fmod = 10 Hz. The present results suggest that cochlear damages reduce the usefulness of these two types of cues to an approximately equal degree.

[1]  Brian C. J. Moore,et al.  Detection of combined frequency and amplitude modulation , 1992 .

[2]  B C Moore,et al.  Effects of carrier frequency and background noise on the detection of mixed modulation. , 1994, The Journal of the Acoustical Society of America.

[3]  B C Moore,et al.  Discrimination of modulation type (amplitude modulation or frequency modulation) with and without background noise. , 1994, The Journal of the Acoustical Society of America.

[4]  N. Viemeister.  Temporal modulation transfer functions based upon modulation thresholds. , 1979, The Journal of the Acoustical Society of America.

[5]  E M Burns,et al.  Pure-tone pitch anomalies. II. Pitch-intensity effects and diplacusis in impaired ears. , 1986, The Journal of the Acoustical Society of America.

[7]  So,et al.  An excitation‐pattern model for intensity discrimination , 1981 .

[8]  S Buus,et al.  Lateralization and frequency selectivity in normal and impaired hearing. , 1984, The Journal of the Acoustical Society of America.

[9]  B. Moore.  Perceptual Consequences of Cochlear Damage , 1995 .

[10]  P M Zurek,et al.  Frequency-discrimination ability of hearing-impaired listeners. , 1981, Journal of speech and hearing research.

[11]  A R Thornton,et al.  Low-frequency hearing loss: perception of filtered speech, psychophysical tuning curves, and masking. , 1977, The Journal of the Acoustical Society of America.

[12]  A. Ryan,et al.  Neural phase-locking properties in the absence of cochlear outer hair cells , 1981, Hearing Research.

[13]  K W Grant.  Frequency modulation detection by normally hearing and profoundly hearing-impaired listeners. , 1987, Journal of speech and hearing research.

[14]  C Trahiotis,et al.  Discrimination of interaural temporal disparities by normal-hearing listeners and listeners with high-frequency sensorineural hearing loss. , 1986, The Journal of the Acoustical Society of America.

[15]  A. Palmer,et al.  Phase-locking in the cochlear nerve of the guinea-pig and its relation to the receptor potential of inner hair-cells , 1986, Hearing Research.

[16]  H S Colburn,et al.  Frequency dependence of binaural performance in listeners with impaired binaural hearing. , 1992, The Journal of the Acoustical Society of America.

[17]  L. Demany,et al.  Detection thresholds for sinusoidal frequency modulation. , 1989, The Journal of the Acoustical Society of America.

[18]  N F Viemeister,et al.  Frequency modulation versus amplitude modulation discrimination: evidence for a second frequency modulation encoding mechanism. , 1994, The Journal of the Acoustical Society of America.

[19]  C Kaernbach,et al.  Simple adaptive testing with the weighted up-down method , 1991, Perception & psychophysics.

[20]  M A Fernandes,et al.  Factors influencing the masking level difference in cochlear hearing-impaired and normal-hearing listeners. , 1984, Journal of speech and hearing research.

[21]  B C Moore,et al.  Effects of carrier frequency, modulation rate, and modulation waveform on the detection of modulation and the discrimination of modulation type (amplitude modulation versus frequency modulation). , 1995, The Journal of the Acoustical Society of America.

[22]  William M. Hartmann,et al.  Detection of mixed modulation , 1980 .

[23]  A. Sęk,et al.  Perception of amplitude and frequency modulated signals (mixed modulation). , 1987, The Journal of the Acoustical Society of America.

[24]  W M Hartmann,et al.  Theory of frequency modulation detection for low modulation frequencies. , 1980, The Journal of the Acoustical Society of America.

[25]  Brian C. J. Moore,et al.  The relationship between frequency selectivity and frequency discrimination for subjects with unilateral and bilateral cochlear impairments , 1986 .

[26]  F L Wightman,et al.  Interaural time discrimination ability of listeners with sensorineural hearing loss. , 1980, Audiology : official organ of the International Society of Audiology.

[27]  J. E. Rose,et al.  Phase-locked response to low-frequency tones in single auditory nerve fibers of the squirrel monkey. , 1967, Journal of neurophysiology.

[28]  J. L. Goldstein,et al.  A central spectrum model: a synthesis of auditory-nerve timing and place cues in monaural communication of frequency spectrum. , 1983, The Journal of the Acoustical Society of America.

[29]  B C Moore,et al.  Detection of frequency modulation at low modulation rates: evidence for a mechanism based on phase locking. , 1996, The Journal of the Acoustical Society of America.