Relaxation videos.
YouTube has a DELUGE of them. Whisper accompanied videos, roleplay relaxation videos, free hypnosis sessions and other gently spoken uploads. Listen to them. The good ones. Some are a nuisance due to poor sound quality or someone getting you down off your cloud by entering the room.
The following video is a spa themed roleplay for receiving a facial. It's very well done. Very good sound quality. Remember, there are a ton on YouTube like this and many other tranquil feeling ear and eye drugs. Some have remarked on YouTube via comments that watching masseuses perform massages on their clients is relaxing to watch.