Audio amplifiers; Audio speakers; Charging appliances for rechargeable equipment; Data processing apparatus; Downloadable computer software for controlling the operation of audio and video devices; Downloadable computer software for improving voice intelligibility, speech enhancement, noise cancellation, dereverberation, acoustic echo cancellation and audio signal enhancement; Downloadable software to control and improve audio equipment sound quality; Earphones; Headphones; Headsets for telephones; Integrated circuit modules; Loud speakers; Microphones; Personal headphones for sound transmitting apparatuses; Pocket translators; Recorded computer operating software; Smart glasses; Sound recording apparatus; Sound transmitting apparatus; Video cameras; Wireless headphones