These tracks typically involve "Situation Voice" (シチュエーションボイス), where a voice actor performs a scripted scenario—ranging from soothing ear cleaning and whispered storytelling to more intense character-driven narratives.
You can find the specific title, voice actor, and creator by searching the ID "RJ392739" directly on the DLsite website . RJ392739.mp3
Like most works in this catalog series, RJ392739 utilizes 3D audio recording techniques (often using specialized microphones like the 3Dio or Neumann KU100 ). This creates a "spatial" sensation where the listener perceives sound moving around their head. RJ392739.mp3
To experience the intended spatial effects, these files must be listened to with headphones . RJ392739.mp3