This post is about social science analysis of Chi-Fi, world Hi-Fi market, and a novel audiophile smartphone product. If this post is not suitable for this thread, please kindly help to transfer it to a suitable thread, thank u! As a Chinese audiophile, I am very concerned about the development...

Recently, I've noticed people in our group chat often miscalculating sensitivity, and I can't find any reliable methods or derivations for sensitivity conversion online (the first few results on Baidu are misleading). So I decided to write this article... BTW, I'm Chinese. Please forgive my poor...