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Abstract
The purpose of this investigation was to examine the potential for directional hearing aid benefit in listeners with severe hearing loss at multiple SNRs for both auditory only and audio-visual presentation modes. Speech recognition performance was measured using the connected speech test at six SNRs individually determined for each subject in order to avoid floor and ceiling effects. The results revealed significant directional benefit was present at all tested SNRs in the presence of visual information. For auditory only presentations, significant directional benefit was only present at the least positive SNR. The largest directional benefit was measured at the poorest tested SNR for both auditory only and audio-visual presentation modes. The results of this study generally support small but significant directional for listeners with severe hearing loss benefit in a difficult listening environment both with and without the presence of visual information.
Sumario
El objetivo de esta investigación fue examinar el beneficio potencial de los auxiliares auditivos direccionales en personas con hipoacusia severa en múltiples condiciones de señal/ruido (SNR) tanto en modo auditivo como en audio-visual. Se midió el desempeño en el reconocimiento del lenguaje mediante la prueba de lenguaje conectado a seis diferentes SNR, determinados en cada individuo para evitar el efecto de piso/techo. Los resultados revelan un beneficio direccional significativo en las seis condiciones de prueba en presencia de información visual. En la presentación exclusivamente auditiva, el beneficio sólo se presentó con la SNR menos positiva. El mayor beneficio direccional se midió con la SNR mas pobre tanto en el modo auditivo como en el audio-visual. Los resultados generales de este estudio apoyan que existe un beneficio direccional pequeño pero significativo para personas con hipoacusia severa en ambientes sonoros difíciles, con o sin información visual.
| Acronyms | ||
| AI | = | articulation index |
| AO | = | auditory only |
| AV | = | auditory + visual |
| CST | = | Connected Speech Test |
| dB HL | = | decibels hearing level |
| HLD | = | hearing loss desensitization |
| PTA | = | pure-tone average |
| REAR | = | real ear aided response |
| SII | = | Speech Intelligibility Index |
| SNR | = | signal-to-noise ratio |
| Acronyms | ||
| AI | = | articulation index |
| AO | = | auditory only |
| AV | = | auditory + visual |
| CST | = | Connected Speech Test |
| dB HL | = | decibels hearing level |
| HLD | = | hearing loss desensitization |
| PTA | = | pure-tone average |
| REAR | = | real ear aided response |
| SII | = | Speech Intelligibility Index |
| SNR | = | signal-to-noise ratio |