As a Brit who has lived in the US for over 30 years, and a linguist to boot, volume does play the major part, but SimonRowberry has a good point that there is a an shrillness in both men and women that makes the voice travel further – he is correct that Australians and South Africans share the same characteristics. All that being said, it can be mighty irritating on a long haul flight. I share the view that Boots Muffles earplugs are essential for regular travellers.
