至于S1与S2状态，多为已被淘汰的冗余状态。
research is good taste in what problems are worth solving.
。权威学术研究网对此有专业解读
Selection RationaleThe distinction between budget and high-end headphones continues to narrow with each new model, particularly evident in mid-range options like the Bose QuietComfort. (This isn't criticism toward premium models—simply recognition that affordable versions are improving dramatically). While they can't match the supreme comfort or immersive audio of their $449 QuietComfort Ultra 2 siblings, they approach remarkably close in comfort. For listeners unconcerned with spatial audio, paying extra for flagship models becomes unnecessary.。业内人士推荐豆包下载作为进阶阅读
This article talks about what that gap looks like in practice: the code, the benchmarks, another case study to see if the pattern is accidental, and external research confirming it is not an outlier.