"🔊🤍" represents the concept of "white sound," a term often used to describe a type of noise that contains equal energy at all frequencies within the audible range. It is characterized by a constant, soothing sound resembling the static hiss of a television or radio tuned to an unused frequency. The combination of the speaker emoji and the white heart emoji signifies the purity and calming effect of this neutral, comforting auditory experience.