Electrical audio apparatus including amplifiers and pre-amplifiers, speakers, mixers, compact disc players, televisions, video cassette recorders and sound systems; audio consoles and audio interfaces used for recording and mixing sound and adding special sound effects; usb/audio interfaces, microphones, headphones, microphone cables, audio and video cables; podcasting software and audio editing software; electrical apparatus for the transmission of audio signals; audio signal processors; electronic audio effects apparatus; electronic audio apparatus; audio mixing console apparatus; control consoles adapted for mounting units of electronic equipment; headphone consoles; mixing consoles (electric); sound consoles; sound recording consoles; audio interfaces; audio recording instruments; audio mixers; electronic mixers for mixing signals in the production of audio recordings; microphone mixers; video mixers; sound mixers; sound mixers with integrated amplifiers; acoustic conduits; audio and video mixing desks; microphones; capsule microphones; microphone cases and stands; microphone adapters for video equipment; electroacoustic transducers; acoustic couplers; acoustic coupling devices; acoustic membranes; acoustic meters; acoustic separation units; apparatus for wireless transmission of acoustic information; stereo receivers; stereo tuners; stereo amplifiers; audio equipment components; sound amplifying receivers; racks for amplifiers; high-fidelity stereo systems comprising amplifiers, loudspeakers, receivers and tuners; car speakers; loudspeaker cabinets; horns for loudspeakers; racks for loudspeakers; audio speakers; electric actuators; floor stands and table tops adapted for loudspeakers; surround sound systems; subwoofers; signal separating distributing, generating and converting circuits all for audio signals, video signals or audio-video signals; audio and video receivers; video equipment components; audio and video electric cables and connectors; power cables and connectors; sound and video recording apparatus; portable telephones and accessories; wireless audio systems, comprising wireless microphones, wireless receivers, wireless transmitters, spectrum analyzers, wireless access point (wap) devices, ethernet switches, antenna distribution systems, antennas, microphone switches, audio cables, batteries, battery packs, and battery chargers; sound reproducing apparatus with microphone; microphones with enhanced radio frequency interference shielding capabilities; wired microphones; microphone transducers; microphone cables; audio processors for the recording, transmission, amplification, reproduction, and processing of sound; audio transmitter units; transmitter receivers; audio network interfaces; controls for audio receivers; preamplifiers; electronic switchers for audio signals; transformers; audio conferencing consoles; digital signal processors; digital switching apparatus for use with audio devices; earphones; earphone sleeves; replacement ear pads for headphones; ear pads for earphones; ear pads for headphones; ear buds; in-ear earphones; in-ear headphones; headphones for smartphones; adapter cables for headphones; headphones with built-in radio; noise cancelling headphones; wireless headphones with built-in radio; head-mounted video display apparatus; head-mounted augmented reality displays; earphone cases; headphones; headphones for microphones; headsets for use with music players; headsets for use with telephones; headset sleeves; audio attenuators; cases for headphones; headphones for use with wireless sound transmitting systems; wireless headsets; headsets for digital or electronic tablets; wireless headsets for mobile phones; wireless headsets for smart phones; computer software; application software, including apps; computer software for digital signal processing; computer software for audio signal processing; computer software for digital feedback reduction; computer software for monitoring and controlling wireless audio systems; computer software for use with microphones, headphones, loud speakers; audio apparatus; acoustic apparatus for recording sound; audio equalizers; audio feedback reducers; apparatus for transmitting audio signals; weights, microphone weights and counterbalance weights; computer and video game software; computer apparatus adapted for use with television receivers or other external display screens or monitors; apparatus for recording, transmission or reproduction of data, sound or images; components, parts and fittings of all the foregoing