The question of where to listen to 'Ocean's Echo' on audio comes up a lot in the spaces I'm in. I found it exclusively on Audible, at least in the US. I did the free trial just for this one, and it worked perfectly. The narrator, I think it was Ferdelle Capistrano? They do a really good job, especially with the two lead characters' voices—Tennal and Surit have such distinct energies, and the performance nails that push-pull dynamic. It's not just a straight read; you get the tension and the weird, invasive intimacy of the neural link right from the start.
If Audible isn't your thing, check if your local library offers it through their digital service like Libby or Hoopla. Availability varies wildly by region, but it's worth a search. I couldn't find it on Spotify, Google Play Books, or any of the other major non-subscription platforms when I looked last month. Sometimes with these Tor books, the audio rights are locked up pretty tight. I ended up keeping the Audible subscription because I listen while commuting, and the catalog is decent, but I know not everyone wants that model.
A quick warning: the audiobook doesn't include the bonus short story that's in some ebook editions. That was a slight bummer, but the main story is complete. The audio quality is crisp, and the pacing felt right for a story that's part political intrigue, part forced-connection drama. I listened to most of it over a weekend while doing chores, and the worldbuilding through sound kept me hooked even during the slower bits.