Edge effects on frequency discrimination of tones presented in low- and high-pass noise backgrounds.
J Acoust Soc Am
; 82(5): 1593-7, 1987 Nov.
Article
em En
| MEDLINE
| ID: mdl-3693698
ABSTRACT
Previous research has indicated that frequency discrimination performance is poorer for tones presented near the sharp spectral edge of a low-pass noise than for tones presented near the edge of a high-pass noise, or for tones in the same low-pass noise with high-pass noise added [Emmerich et al., J. Acoust. Soc. Am. 80, 1668-1672 (1986)]. The present study extends these findings in order to investigate how the steepness of the spectral edges of low- and high-pass maskers influences the discriminability of tones presented near these edges. Frequency discrimination was measured in each of three high- and low-pass noise backgrounds (which differed in the steepness of their filter skirts). The following results were obtained (1) In the low-pass noise background, frequency discrimination performance improved as the filter skirt became more gradual; (2) in the high-pass noise background, performance first improved and then became poorer as the filter skirt became shallower; and (3) performance in low-pass noise was poorer than that in high-pass noise for the two steepest slopes employed (96 and 72 dB/oct) but not for the shallower slope (36 dB/oct). Results are discussed in the context of lateral suppression and edge pitch effects, and of a trade-off between possible edge effects and masking.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Percepção Auditiva
/
Discriminação Psicológica
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
J Acoust Soc Am
Ano de publicação:
1987
Tipo de documento:
Article