Sound Oasis BST-400 is a lifestyle app designed by Headwaters Inc. to provide relief for tinnitus symptoms. This app, a complement to the BST-400 Stereo Sound Therapy System, offers 25 free therapeutic sounds, including stereo options for enhanced realism. It features a 12-band audio equalizer for personalized frequency tuning, a white noise overlay for sound customization, and information on managing tinnitus effectively.

The app functions through sound therapy and masking techniques to reduce the noticeability of tinnitus symptoms, especially in quiet environments. By listening to pleasant sounds similar to tinnitus frequencies, users can potentially alleviate the annoyance of tinnitus noises, promoting better sleep and relaxation.