Listen to Hypnotic Sound online. Hypnotic Sound is an English language song and is sung by Rain Sounds, Rain for Deep Sleep and Deep Sleep. Hypnotic Sound, from the album A Good Night's Sleep - 20 Loopable Relaxing Rain Sounds to Beat Insomnia, was released in the year 2017. The duration of the song is 1:48. Download English songs online from JioSaavn.