Summary
Parakeets were tested for the ability to detect sinusoidal amplitude modulation of broad band noise. Instrumental avoidance conditioning and a psychophysical modified method of limits procedure were used to measure the threshold for detecting amplitude modulation at 10 modulation frequencies between 2 and 2,048 Hz. Below about 40 Hz, modulation threshold is independent of modulation rate and noise level. Above 40 Hz, modulation threshold decreases with modulation frequency at the rate of 3 dB/ octave. These results are somewhat different from amplitude modulation functions in humans suggesting different degrees of temporal resolving power in birds and humans. Thresholds for changes in modulation rate are 1–2 orders of magnitude higher than pure tone frequency difference limens.
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References
Ahroon W, Fay R (1977) Temporal modulation discrimination function (Abstract). J Acoust Soc Am 61:588
Burns EB, Viemeister NF (1976) Nonspectral pitch. J Acoust Soc Am 60:863–869
Dooling RJ (1979) Temporal summation of pure tones in birds. J Acoust Soc Am 65:1058–1060
Dooling RJ (1980) Behavior and psychophysics of hearing in birds. In: Popper A, Fay R (eds) Comparative studies of hearing in vertebrates. Springer, Berlin Heidelberg New York, pp 261–288
Dooling RJ, Haskell RJ (1978) Auditory duration discrimination in the parakeet (Melopsittacus undulatus). J Acoust Soc Am 63:1640–1642
Dooling RJ, Saunders JC (1975a) Hearing in the parakeet (Melopsitacus undulatus): Absolute thresholds, critical ratios, frequency difference limens, and vocalizations. J Comp Physiol Psychol 88:1–20
Dooling RJ, Saunders JC (1975b) Auditory intensity discrimination in the parakeet (Melopsittacus undulatus). J Acoust Soc Am 58:1308–1310
Dooling RJ, Searcy MH (1979) The relation among critical ratios, critical bands, and intensity difference limens in the parakeet (Melopsittacus undulatus). Bull Psychon Soc 13:300–302
Dooling RJ, Zoloth SR, Baylis JR (1978) Auditory sensitivity, equal loudness, temporal resolving power and vocalizations in the housefinch (Carpodacus mexicanus). J Comp Physiol Psychol 92:867–876
Fay RR (1974) Auditory frequency discrimination in vertebrates. J Acoust Soc Am 56:206–209
Fay RR, Popper AN (1980) Structure and function of teleost auditory systems. In: Popper A, Fay R (eds) Comparative studies of hearing in vertebrates. Springer, Berlin Heidelberg New York, pp 3–42
Greenewalt CH (1968) Birdsong: Acoustics and physiology. Smith sonian Institution Press, Washington, DC
Hall L, Patricoski M, Fay R (1980) Neurophysiological mechanisms of intensity discrimination. Symposium on Hearing and Sound Communication in Fishes. Sarasota, Florida
Jesteadt W, Wier CC, Green DM (1977) Intensity discrimination as a function of frequency and sensation level. J Acoust Soc Am 61:169–177
Konishi M (1969) Time resolution by single auditory neurons in birds. Nature 222:566–567
Møller AR (1973) Coding of amplitude modulated sounds in the cochlear nucleus of the rat. In: Møller AR (ed) Basic mechanisms in hearing. Academic Press, New York, pp 593–619
Penner MJ (1980) Evidence for two temporal processes in forward masking. J Acoust Soc Am 68:455–457
Pumphrey RJ (1961) Sensory organs; hearing. In: Marshall AJ (ed) Biology and comparative anatomy of birds. Academic Press, New York
Rodenburg M (1977) Investigation of temporal effects with amplitude modulated signals. In: Evans E, Wilson J (eds) Psycho-physics and physiology of hearing. Academic Press, London, pp 429–437
Sachs MB, Lewis RH, Young ED (1974) Discharge patterns of single fibers in the pigeon auditory nerve. Brain Res 70:431–447
Sachs MB, Sinnott JM, Hienz RD (1978) Behavioral and physiological studies of hearing in birds. Fed Proc 37:2329–2335
Salvi R, Giraudi D, Henderson D, Hamernick R (1979) Detection of sinusoidally amplitude modulated noise by chinchillas (Abstract). J Acoust Soc Am 65:559
Saunders JC, Denney RM, Bock GR (1978) Critical bands in the parakeet (Melopsittacus undulatus). J Comp Physiol 125:359–365
Smith CA, Takasaka T (1971) Auditory receptor organs of reptiles, birds and mammals. In: Heff WD (ed) Contributions to sensory physiology. Academic Press, New York, pp 129–178
Trillmich F (1976) Learning experiments on individual recognition in Budgerigars (Melopsittacus undulatus). Z Tierpsychol 41:372–395
Viemeister NF (1977) Temporal factors in audition: A system analysis approach. In: Evans E, Wilson J (eds) Psychophysics and physiology of hearing. Academic Press, London, pp 419–428
Viemeister NF (1979) Temporal modulation transfer functions based upon modulation thresholds. J Acoust Soc Am 66:1364–1380
Wier CC, Jesteadt W, Green DM (1977) Frequency discrimination as a function of frequency and sensation level. J Acoust Soc Am 61:177–184
Wilkinson R, Howse PE (1975) Time resolution of acoustic signals by birds. Nature 258:320–321
Yost WA (1980) Man as mammal: Psychoacoustics. In: Popper A, Fay R (eds) Comparative studies of hearing in vertebrates. Springer, Berlin Heidelberg New York, pp 399–420
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We thank Frank Cusimano, Ann Huessener, Susan Peters, Roberta Pickert, Bill Searcy, Ken Yasukawa and Tim DeVoogd for participating as subjects, and Dick Fay for providing critical comments. This research was supported by grant No. PHS MH31165 from the National Institute of Mental Health to the first author.
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Dooling, R.J., Searcy, M.H. Amplitude modulation thresholds for the parakeet (Melopsittacus undulatus). J. Comp. Physiol. 143, 383–388 (1981). https://doi.org/10.1007/BF00611177
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DOI: https://doi.org/10.1007/BF00611177