Orca, also known as killer whales, are highly intelligent and social marine mammals that communicate with a variety of vocalizations. Their vocalizations range from high-pitched whistles to low-frequency pulses, and they use these sounds for communication, navigation, and hunting.
For sleep purposes, recordings of Orca sounds, especially the lower frequency pulses, can be soothing and calming. They have a repetitive and rhythmic quality that can induce a sense of relaxation and calmness, which can help you fall asleep faster and sleep more soundly.
In particular, recordings of Orca calls, which are long, drawn-out vocalizations, can create a peaceful atmosphere that promotes sleep. These calls can be quite melodious and can produce a sense of tranquility that can help you drift off to sleep.
Won-Planet