Yes, when my child was 3-6, very sensitive to sound. I can only speak to this aspect. dishwasher, vacuum, a sudden loud noise, all problematic -- had to help child learn to adjust with some warning, tell child to go to room first, cover ears, etc etc
Also, loud birthday parties or a noisy/mall, child would be very sensitive. I actually think the child may be able to tolerate only so much and it may drain the child of his/her energy.
Some children find it easier to listen/hear when not having to look at a person because the facial expressions or body language is actually distracting. Rarely can a child that young explain it. Eventually my child was able to explain that fiddling with something in hand helped to focus when listening.
Sorry, not too much help here. Best of luck you.
