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Titolo:
Monaural and binaural detection of sinusoidal phase modulation of a 500-Hztone
Autore:
Witton, C; Green, GGR; Rees, A; Henning, GB;
Indirizzi:
Univ Newcastle Upon Tyne, Sch Med, Dept Physiol Sci, Newcastle Upon Tyne NE2 4HH, Tyne & Wear, England Univ Newcastle Upon Tyne Newcastle Upon Tyne Tyne & Wear England NE2 4HH Univ Oxford, Dept Expt Psychol, SRU, Oxford OX1 3UD, England Univ Oxford Oxford England OX1 3UD Psychol, SRU, Oxford OX1 3UD, England
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 4, volume: 108, anno: 2000,
pagine: 1826 - 1833
SICI:
0001-4966(200010)108:4<1826:MABDOS>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUDITORY CORTICAL-NEURONS; MEDIAL SUPERIOR OLIVE; INTERAURAL PHASE; INFERIOR COLLICULUS; HORIZONTAL PLANE; SOUND SOURCE; FREQUENCY; CAT; MOTION; DIRECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Witton, C Univ Oxford, Physiol Lab, Parks Rd, Oxford OX1 3PT, England UnivOxford Parks Rd Oxford England OX1 3PT rd OX1 3PT, England
Citazione:
C. Witton et al., "Monaural and binaural detection of sinusoidal phase modulation of a 500-Hztone", J ACOUST SO, 108(4), 2000, pp. 1826-1833

Abstract

The detectability of phase modulation was measured for three subjects in two-alternative temporal forced-choice experiments. In experiment 1, the detectability of sinusoidal phase modulation in a 1500-ms burst of an 80-dB (SPL), 500-Hz sinusoidal carrier presented to the left ear (monaural condition) was measured. The experiment was repeated with an 80-dB, 500-Hz static (unmodulated) tone at the right ear (dichotic condition). At a modulation rate of 1 Hz, subjects were an order of magnitude more sensitive to phase modulation in the dichotic condition than in the monaural condition. The dichotic advantage decreased monotonically with increasing modulation rate. Subjects ceased to detect movement in the dichotic stimulus above 10 Hz, but a dichotic advantage remained up to a modulation rate of 40 Hz. Thus, although sound movement detection is sluggish, detection of internal phase modulation is not. In experiment 2, thresholds for detecting 2-Hz phase modulationwere measured in the dichotic condition as a function of the level of the pure tone in the right ear. The dichotic advantage persisted even when the level of the pure tone was reduced by 50 dB or more. The findings demonstrate a large dichotic advantage which persists to high modulation rates and which depends very little on interaural level differences. (C) 2000 Acoustical Society of America. [S0001-4966(00)05110-9].

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Documento generato il 05/12/20 alle ore 02:04:58