Adverse listening conditions result in poorer speech recognition in children compared to adults. Despite the American National Standards Institute recommended SNR of at least +15 dB for U.S. classrooms, studies indicate that classroom noise levels actually range from +5 to -7 dB SNR providing children with less than ideal learning environments. Studies indicate that these adverse conditions are known to support word identification scores of no greater than 60% correct for children.A study by Sato and Bradley examined the speech recognition in noise performance of children ages 6, 8 and 11 years old at school in their own classrooms. In each classroom, rather than altering the level of the noise, the speech playback level was changed relative to the existing natural ambient noise, to vary the signal to noise ratio experienced by the children.
Sullivan JR, Carrano C, Osman H (2015) Working Memory and Speech Recognition Performance in Noise: Implications for Classroom Accommodations. Commun Disord Deaf Stud Hearing Aids 3:136. doi: 10.4172/2375-4427.1000136