A study examined how fast speech and background noise impact sentence processing in children who are deaf or hard of hearing (DHH) compared to those with normal hearing (NH). Researchers tested 31 DHH children and 27 NH children, aged 8 to 13, using 16-talker babble noise at fast (6.1 syllables per second) and normal (4.5 syllables per second) speaking rates. Participants were asked to identify a target word in sentences, with response time measured. The findings showed that both groups were slower to process fast speech, but DHH children did not show a greater delay compared to their NH peers. However, DHH children processed sentences in noisy environments more slowly than NH children at both speaking rates. The study highlights that fast speech in noisy settings can hinder sentence processing for all children, with DHH children potentially facing more challenges in real-world listening situations. No significant relationships were found between working memory capacity, vocabulary knowledge, and response times.