Pool notes: three ways people hear audio while swimming

Not a product review — just the lanes I’ve seen other lap swimmers use when they want music or a coach cue in the water.

1. Onboard local storage. The playlist lives on the headset itself. You load tracks before you dive, then leave the phone in the locker. No radio link to maintain mid-set. Downside: you can’t change the setlist once you’re wet, and there’s no live coach talk.

2. Dry poolside transmitter. Phone stays poolside (or with a coach). A small dry box takes the phone’s audio and sends it out as a pool-friendly radio signal to waterproof receivers. This is how people keep a streaming playlist moving without asking Bluetooth to cross water. The dry box has to stay dry and roughly line-of-sight to the lane.

3. Coach-voice only. Separate from music. A long-range mic/headset setup so the coach can talk over a routine while athletes are underwater. Useful for synchro and squad drills; not meant as a Spotify substitute.

Bluetooth itself drops off fast once you’re a body-length underwater — water absorbs that band — which is why “waterproof Bluetooth buds” often feel fine on deck and die mid-lap. The three lanes above are workarounds people actually use.

If you’ve settled on one of these for masters or open water, curious what broke first for you: battery, fit, or the radio link.