High-Frequency Sensitivity in Infants

Abstract

Auditory thresholds were determined for infants and adults to half-octave bands of noise centered at 10,000 and 19,000 hertz. Adults were significantly more sensitive than infants at 10,000 hertz, but at 19,000 hertz, adults and infants had comparable thresholds.

Audiometria de alta freqüência: estudo com indivíduos audiologicamente normais

“…Os resultados encontrados até o presente momento, em indivíduos audiologicamente normais, mostram evidências da excelente sensibilidade auditiva para sons de alta freqüência em crianças [4][5][6][7] . Outros autores 6,[8][9][10][11][12][13][14][15] , estudando adultos, evidenciaram uma tendência ao declínio da sensibilidade, com o avanço da idade.…”

An observer-based psychoacoustic procedure for use with young infants.

“…An obvious extension to audition would be to have sounds presented to the infant's right or to the infant's left and have the observer decide from where the sound was coming on the basis of some directional response made by the infant. In fact, conditioned head-turn studies have used a similar paradigm (e.g., Schneider, Trehub & Bull, 1980;Trehub, Schneider, & Endman, 1980). However, this approach suffers from at least three basic problems.…”

Developmental perspectives on the localization and detection of auditory signals

“…The fact that the 2AFC-L procedure yields superior perfonnance for infants may seem surprising in light of the lower thresholds that have been reported in G/NG-D studies (e.g., Berg & Smith, 1983;Wilson & Moore, 1978) as opposed to 2AFC-L studies (e.g., Schneider et al, 1980;Trehub et al, 1980;Trehub et al, 1989).…”

“…The head-turning or localization response can be elicited by 5 or 6 months of age (Chun, Pawsat, & Forster, 1960), and reinforcement can maintain it at high levels for 30-40 trials within a single session (Moore, Thompson, & Thompson, 1975;Suzuki & Ogiba, 1961;. Indeed, the robust nature of this technique and its applicability in the early years have made it the method of choice for studying absolute thresholds (Berg & Smith, 1983;Olsho, 1985;Schneider, Trehub, & Bull, 1980;Sinnott, Pisoni, & Aslin, 1983;Trehub, Bull, Schneider, & Morrongiello, 1986;Trehub, Schneider, & Endman, 1980;Trehub, Schneider, Morrongiello, & Thorpe, 1989), masked thresholds Nozza & Wilson, 1984;Schneider, Trehub, Morrongiello, & Thorpe, 1989;, critical bands (Olsho, 1985;Schneider, Morrongiello, & Trehub, 1990), and binaural unmasking (Nozza, 1987;Schneider, Bull, & Trehub, 1988) in infants and young children.…”

“…In the two-alternative, forced-choice version (2AFC; see, e.g., Schneider et al, 1980Schneider et al, , 1989Trehub et al, 1980;Trehub et al, 1989), loudspeakers are located to the infant's left and right. As in the single-loudspeaker version, the experimenter faces the infant and initiates a trial only when the infant is looking directly ahead.…”