amplifiers, apparatus for sound amplification in the nature of sound filters being audio amplifiers, amplifier for wireless communications, apparatus for recording, transmission, processing and reproduction of sound, apparatus for speech recording and replaying, audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings, audio dubbing apparatus, audio headphones, audio mixers, audio processing equipment, namely, limiters and compressors, guitar amplifiers, sound systems comprising remote controls, and loudspeakers for radio apparatus, mixers and amplifiers; intercommunication apparatus, namely, intercoms; recorded software for selecting of sound frequencies, sound source directions and amplification and attenuation thereof; recorded computer operating programs; downloadable computer programs for selecting of sound frequencies and sound source directions and amplification and attenuation thereof; audio and video receivers; sound reproduction apparatus; sound transmitting apparatus; walkie-talkies; remote control apparatus, namely, remote controls for cellular telephones and personal electronic devices in the nature of portable computers, mobile telephones, tablet computers, MP3 Players, wearable computers, wearable activity trackers, smart watches, virtual reality headsets adapted for use in playing video games, virtual reality eye glasses, headsets for cellular or mobile phones, headsets for telephones, headsets for use with computers, wireless cellular phone headsets, drive thru telephone headsets, wireless headsets for smart phones, personal headphones for use with sound transmitting systems, music headphones, stereo headphones, virtual reality headphones, headphones; personal stereos; portable media players; cabinets for loudspeakers; telephone receivers; microphones; handsfree kits for telephones; computer peripheral devices; telecommunication transmitters