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Titolo:
Multiple auditory steady-state responses to AM and FM stimuli
Autore:
John, MS; Dimitrijevic, A; van Roon, P; Picton, TW;
Indirizzi:
Univ Toronto, Rotman Res Inst, Baycrest Ctr Geriatr Care, Toronto, ON M6A 2E1, Canada Univ Toronto Toronto ON Canada M6A 2E1 Care, Toronto, ON M6A 2E1, Canada
Titolo Testata:
AUDIOLOGY AND NEURO-OTOLOGY
fascicolo: 1, volume: 6, anno: 2001,
pagine: 12 - 27
SICI:
1420-3030(200101/02)6:1<12:MASRTA>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
FREQUENCY-MODULATED TONES; RATE-INTENSITY FUNCTIONS; TIME-VARYING STIMULI; NERVE FIBERS; EVOKED-POTENTIALS; MIXED MODULATION; SPECTRAL CHARACTERISTICS; AMPLITUDE-MODULATION; SELECTIVE ADAPTATION; COCHLEAR NUCLEUS;
Keywords:
auditory steady-state responses; amplitude modulation; frequency modulation; objective audiometry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
65
Recensione:
Indirizzi per estratti:
Indirizzo: Picton, TW Univ Toronto, Rotman Res Inst, Baycrest Ctr Geriatr Care, 3560 Bathurst St, Toronto, ON M6A 2E1, Canada Univ Toronto 3560 Bathurst St Toronto ON Canada M6A 2E1 Canada
Citazione:
M.S. John et al., "Multiple auditory steady-state responses to AM and FM stimuli", AUDIOL NEUR, 6(1), 2001, pp. 12-27

Abstract

Multiple auditory steady-state responses were recorded using tonal stimulithat were amplitude-modulated (AM), frequency-modulated (FM)or modulated simultaneously in both amplitude and frequency (mixed modulation or MM). When MM stimuli combined 100% AM and 25% FM (12.5% above and below the carrierfrequency) and the maximum frequency occurred simultaneously with maximum amplitude, the MM response was one third larger than the simple AM response. This enhancement occurred at intensities between 50 and 30 dB SPL and at carrier frequencies between 500 and 4000 Hz. The AM and FM components of a MM stimulus generate independent responses that add together to give the MMresponse. Since AM responses generally occur with a slightly later phase delay than FM responses, the largest MM response is recorded when the maximum frequency of the MM stimulus occurs just after the maximum amplitude. Copyright (C) 2001 S. Karger AG, Basel.

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Documento generato il 04/04/20 alle ore 07:51:29