I read a few articles related infant & dog's auditory preference. They both mentioned "baby talk" could be more attractive to infant & dog. And my team and I want to find out the reason from evo-psych. We already know one of necessary condition is high pitch, and had some data about high pitch preference for dogs (we took gaze duration to be parameter).

Our project focus on evo-psych puzzle, so we want to exclude the physical or physiological reason to explain why dog prefer high pitch. I tried to do some reviews to know physical trait of high pitch. But I almost found nothing help because I barely know the domain knowledge of acoustics. So if physical trait of high pitch could explain why mammal like human and dog has such preference, then we should reschedule our project.

Thank you for response such fundamental question.

Sincerely, Jhou.