Active Noise Cancellation Vs Passive Sound Attenuation: Help or Hindrance?
نویسندگان
چکیده
Normal-hearing subjects show improved speech understanding when they wear conventional passive hearing protectors in noisy surroundings. In contrast, hearing-impaired subjects are at a disadvantage. Sound attenuation exacerbates the handicap from hearing loss (Abel et al., 1982). Level-dependent (active) hearing protectors which provide limited amplification of sounds below 85 dBA have the opposite effect. Normal-hearing listeners are at a disadvantage. In contrast, hearingimpaired listeners show some improvement in consonant discrimination and word recognition (Abel et al., 1993).
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