Impaired timing and frequency discrimination in high-functioning autism spectrum disorders.

Bhatara et al. (2013) tested 30 teens with high-functioning autism. All were 12-17 years old and spoke in full sentences.

Each teen sat in a quiet booth. They pressed a button when they heard a tiny gap in white noise. Later they said if two tones were the same or different. The team also asked parents if their child covers ears to everyday sounds.

The ASD group needed gaps twice as long to notice them. They also missed small pitch changes, but only in the highest tones.

Kids whose parents reported sound sensitivity showed the worst pitch scores. Kids without that history scored near typical levels.

Bhaumik et al. (2009) saw the same age group struggle to spot events that happen close in time. Together these studies show timing problems start early and stay.

Burrows et al. (2018) went further. They showed that tiny timing gaps snowball into poorer lip-reading and then weaker speech understanding. The new data fit that chain: poor gap detection may be the first link.

Kaufman et al. (2010) looks like a clash. Their adults with ASD under-estimated long intervals, while the teens here only showed gap problems. The gap is probably age and task: reproducing ten seconds is different from hearing a five-millisecond gap.

If a client covers his ears to vacuum cleaners, also test his pitch skills. Use lower tones for instructions and give longer pauses between directions. These quick tweaks can cut auditory overload and boost compliance.