electronic systems composed of switches, integrated circuits, electronic signal delay circuits, sound amplifiers, sound transmitting apparatus, sound mixers and integrated amplifiers that increase perceived sound based on persistence of hearing characteristics; electronic systems composed of switches, integrated circuits, electronic signal delay circuits, sound amplifiers, sound transmitting apparatus, sound mixers and integrated amplifiers for increasing perceived signals based on persistence of hearing; electronic systems composed of switches, integrated circuits, electronic signal delay circuits, sound amplifiers, sound transmitting apparatus, sound mixers and integrated amplifiers for splitting an audio signal, delaying a portion and recombining with a second portion to increase perceived sound