A lot of people speak loudly on public transport simply because they're unaware of their volume. Some individuals naturally have a louder speaking voice, and when they're engrossed in a conversation, they might not notice how loud they're being. Additionally, cultural norms regarding acceptable noise levels can vary, leading some people to speak more loudly than others might find comfortable.
很多人在公共交通工具上大聲說話,純粹是因為他們沒有意識到自己的音量。有些人天生說話聲音較大,當他們專注於交談時,可能不會注意到自己有多大聲。此外,關於可接受噪音水平的文化規範也有所不同,導致有些人說話的聲音比其他人覺得舒適的音量要大。