Yes, in the sense that they can allow you to listen to content at lower volumes since background noise is reduced. This can potentially reduce the risk of hearing damage caused by prolonged exposure to loud sounds. However, like any earbuds, they should be used at safe volumes and not for excessively long periods.

No. Lossless audio is not a thing with Bluetooth. However, you may find that you don’t actually experience much benefit from it while you’re commuting or are in other high-noise environments, so it’s not a big concern.

Active noise cancelation (ANC) is generally the most effective noise canceling technology for earbuds. It uses microphones to pick up external sounds and produces opposite sound waves to cancel them out.