  The acoustic sensitivity of Autism Spectrum Disorder (ASD) individuals highly
impacts their intelligibility in noisy urban environments. In this Letter, the
disturbance sensing level is examined with perceptual listening tests that
demonstrate the impact of their append High Internal Noise (HIN) profile on
intelligibility. This particular sensing level is then proposed as additional
aid to ASD diagnosis. In this Letter, a novel intelligibility enhancement
scheme is also introduced for ASD particular circumstances. For this proposal,
harmonic features estimated from speech signal frames are considered as center
frequencies of auditory filterbanks. A gain factor is further applied to the
output of the filtered samples. The experimental results demonstrate that the
proposal improved the acoustic intelligibility of ASD and Neurotypicals (NT)
people considering four acoustic noises at different signal-to-noise ratios.
