Listen to Into Deep - Hydrophone Nature Sound Underwater Recording online. Into Deep - Hydrophone Nature Sound Underwater Recording is an Unknown language song and is sung by Nature Sounds for Concentration. Into Deep - Hydrophone Nature Sound Underwater Recording, from the album Nature Sounds for Concentration, Studying, Better Learning, Help Paying Attention, Reading, Stimulate Memory. Sounds of Nature Study Music, was released in the year 2010. The duration of the song is 44:22. Download Unknown songs online from JioSaavn.