computer hardware; downloadable computer software for digital signal processing; portable communication devices, namely, mobile phones, pagers, personal digital assistants, laptop computers, earphones, headsets, portable conferencing devices, portable security monitors, tablets, VR/AR/MR(XR) devices, smart glasses, and vehicle entertainment systems; audio speakers; wired and wireless wearable speakers; portable audio speakers; amplifiers; sound transmitting apparatus; sound recording apparatu...