What is the reality of the 440 Hz frequency, and does it affect humans?

Belief in sonic frequencies and their physical, psychological, and spiritual effects stems from the superstitions of "energy" and charlatanism, especially what some promote regarding specific frequencies like 528 Hz for healing and love, and 440 Hz for inciting fear and illness. These ideas are not based on scientific evidence. Healing with frequencies, as presented by energy charlatans, is unscientific. The most that occurs is suggestion or the superficial effect of the music itself, not of specific frequencies.